新人教版小学10以内加减法练习题500道
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10以内加减法练习题
一、10以内加法练习题
1+1= 2+2= 3+3= 4+4= 5+5=
6+6= 7+7= 8+8= 9+9= 10+10=
二、10以内减法练习题
10-1= 9-2= 8-3= 7-4= 6-5=
7-2= 7-3= 8-8= 9-5= 10-1=
三、10以内加减法混合练习题
5+3-1= 7-2+4= 6+8-5=
9-7+2= 10-3+6= 8+2-4=
4+6-7= 3+5-8= 10-9+1=
三、10以内加减法的应用练习
1.小明有5个苹果,又买了3个,他一共有多少个苹果?
2.小红有10元钱,她花了2元买了一个冰淇淋,她还剩下多少钱?
3.小华有8支铅笔,他送给了朋友2支,他还剩下多少支铅笔?
4.小李有10本书,他借给了朋友3本,他还剩下多少本书
四、10以内加减法的实际应用
1.小明的妈妈给了他一些零花钱,他可以用这些零花钱去买自己喜欢的东西。
比如他可以买一本他喜欢的书,也可以买一支他喜欢的笔。
那么,如果他用了3元钱买了书,又用了2元钱买了笔,他一共花了多少钱?
2.小红的爸爸给了她一些水果,她可以吃这些水果。
如果她吃了5个苹果和3个橙子,她一共吃了多少个水果?
五、提高题
1.想一想:如果我们把"3+2-1"的运算顺序改为"3+2"之后进行减法,结果会一样吗?为什么?
2.再想一想:"8-3+1"和"8-(3+1)"的结果一样吗?为什么?。
新人教版小学10以内加减法练习题500道10以内加减法练习题(一)姓名:时间:做对了题(共50题)()+5=10 ()+4=7 ()-3=3 6-( )=2()-6=2 9-( )=2 3+( )=10 ()-3=06-( )=1 ()-7=3 ()+2=5 ()-7=20+( )=4 ()-0=6 10-( )=8 2+( )=94+( )=9 7-( )=6 ()-3=0 ()+3=9()+7=8 5-( )=2 ()-5=5 ()+3=9()+6=9 1+( )=8 7-( )=7 ()+3=96+( )=10 ()+2=8 ()-3=4 ()+3=83+( )=4 9-( )=0 ()+6=7 10-( )=14+( )=8 ()-9=1 ()-3=5 7-( )=2()+仁4 ()-7=3 ()+8=10 ()-4=29-( )=4 ()-5=1 4+( )=10 ()-6=4()+5=5 ()-2=510以内加减法练习题(二)姓名:时间:做对了题(共50题)3-( )=210-( )=4 ()-1=8 10+( )=10()+7=8 5+( )=9 ( )+5=7 10-( )=3()-2=7 9-( )=5 ( )+3=3 4+( )=10()-9=1 ()-3=4 8-( )=2 10-( )=5()-7=2 5+( )=8 ()+2=7 ()-6=1()+仁7 4+( )=4 ()-0=10 9-( )=1()+4=6 ()+5=10 ( )-6=4 4+( )=610-( )=3 9-( )=8 4+( )=5 ()+5=6()-4=2 8-( )=2 ()+6=6 ()-4=36+( )=7 6-( )=3 ()+3=9 1+( )=8()+2=9 ()-2=4 7-( )=7 2+( )=103+( )=5 0-( )=0 10-( )=3 ()+2=70+( )=5 ( )-2=7姓名:______________ 时间:______________ 做对了_________ 题(共50题)2 + 6 =9 —7 =3 + 2= ! 5 + 4=3 +4 =5 + 4 = 3 + 5= 9 —3 =7+ 1 =9 —3= 8—3= 4—1 =5 —4= 8 —2=0 + 8= 8 + 1 =3+ 1 = 6 + 1 =7+ 3 = 1 + 1 = 10 —2 =7 —2 = 6 —4= 10 —5 = 9 —2 =10 —9 = 5 + 5= 1 + 5 = 5+ 2 =9 —4 =8+ 1 = 3—3 = 2—1 = 4 + 6= 2+ 7= 6 + 0= 9—5 = 3 + 3 = 4 —2 =8 —4 =10 —4 = 1 + 2 = 5 —3= 1 + 9 =0 + 8 =10 —7 = 2 + 4= 5 —1=6 —5 = 4 + 4 =姓名: ________________ 时间:________________ 做对了 ______ 题(共50题)3+ 6 = 2 + 6= 9 —7=3+ 2 =3 + 4二 3 + 5 =7+ 1 = 10 —5 =9-3 =10 —9=9 —2=6+4 =8-3 =5-4 =7+2 =10 —2 = 8-2 =0 + 8 =3+ 1 = 1 + 5=6+ 1 =7+ 3 =10 —2= 3 —3 = 7-2 = 6 —4 =9 —2= 6 + 0 = 10 —9 =5+ 5 = 5 + 2= 8 —4 = 9-4 =8+ 1 =2—1 = 1 + 9 =4+ 6 = 2 + 7 =9—5= 5—1 =3+ 3 = 4 —2 = 4 + 4 = 6 —5 = 10 —4= 1+2= 5 —3= 2+ 4 =0+8= 10 —7=姓名:时间:做对了题(共50题)2 + 6 =9—7 =3 + 2 = 3 +4 =5 + 4 = 3 + 5 =7+ 1 =9—3= 8-3= 5 —4= 8 —2 =7 —2 = 6-4 =9 —2 =10 —9 = 5 + 5 =5+ 2 =9 —4 =8 + 1 =2—1 =4 + 6= 2 + 7=9—5= 3 + 3=4-2 =10 —4=1+2= 5—3=0 + 8 =10 —7 = 1 + 9 =10 —52 + 4 = 6 —5 = 4 + 4 =5—1 = 8 —4 =6+ 0 =3 —3 = 1 + 5 = 1 + 1 =8 + 1 =4 —1 =9—3 = 3+ 6 = 2 + 6 =9—7 =3+ 2 = 3 + 4 =5 + 4 =10以内加减法练习题(六)姓名:时间:做对了题(共50题)9-3 =8 —3 = 5 —4 =8 —2=0 + 8 = 3 + 1 = 6 + 1 =7+ 3 =10 —2 =7 —2 = 6 —4 =9 —2 =10 —9 =5+ 5 =5+ 2 =9 —4 =8+ 1 = 2 —1 =4+ 6 =2+ 7 =9—5 = 3 + 3 = 4 —2 =10 —4=1+2= 5—3= 0+8= 10 —7= 2 + 4 = 6 —5 = 4 + 4 =5—1 =1 + 9 =8 —4=6+ 0 = 3 —3 =1 + 5 =10 —5 = 1 + 1 =8 + 1 = 4—1 =9 —3 = 3 + 6 =3+ 6 = 9—7 = 3 +2 =3 +4 =5 + 4 = 3+ 5 =7 + 1 =10以内加减法练习题(七)姓名:时间:做对了题(共50题)3+ 5 =7 + 1 =9 —3 =8 —3 =5-4 =8 —2=0 + 8 =3+ 1 =6+ 1 =7 + 3 =10 —2=7 —2 =6-4 =9 —2 =10 —9 =5+ 5 = 5+ 2 =9 —4 =8 + 1 =2—1 = 4+ 6 = 2 + 7 =9 —5 = 3 + 3 =4-2 =10 —4=1+2= 5—3=0 + 8 =10 —7 = 2 + 4 = 6 —5 = 4 + 4 = 5 —1 = 1 + 9 =8 —4 =6+ 0 = 3 —3 = 1 + 5 =10 —5 =1 + 1 =8 + 1 =4—1 =9 —3 =3+ 6 =1+4 =1+5 = 1+6 = 1+7 =1+8 =10以内加减法练习题(八)姓名:时间:做对了题共50题)2+2 =2+3 =2+4 =2+5 =2+6 =2+7 =2+8 =3+1 =3+2 =3+3 =3+4 =3+5 =3+6 =3+7 =4+1 =4+2 =4+3 4+4 =4+5 =4+6 =7-1 =7-2 7-3 =7-4 =7-5 =7-6 =7-7 =6-2 =6-3 =6-4 =6-5 =6-6 =5-1 =5-2 =5-3 =10-6 =10-8 =6-1 =1+9 =2+1 =精品文档用心整理1+1+2= 7+2+1= 2+2+2二1+1+1=6+3+1=3-2+仁3+3+3=10-3-5=2+2+3=9-5-3= 10以内加减法练习题(九)姓名:时间:做对了题(共50题)2-1 +1 = 6+1+1= 4+2-3= 9-6+5=9-5-2= 3+5+1= 9-3-4= 2+2-仁1+1+2= 1+1+1= 3+3+3= 2+2+3=7+2+1= 6+3+1= 10-3-5= 9-5-3=2+2+2= 3-2+仁2-1 + 1 = 6+1+1=4+2-3= 9-6+5= 9-5-2= 3+5+1= 9-3-4= 2+2-仁3+4-2= 4+4+2=3+3-3二1+2+3= 2+2+6= 7-7+9=3+5+1= 9-3-4= 2+2-1 = 3+4-2= 4+4+2= 5-2+仁1+3+4= 1+4+5= 1+5+1= 1+6+2= 1+7-2= 2+1+7=2+3+5= 2+4+4= 3+4+1= 3+2+3=9-3+2= 8-5+4=10以内加减法练习题(十)姓名:________________ 时间:________________ 做对了______ 题(共50题)8-6+4= 7-4+2= 8-3-4 = 9-4-5 = 8-3+2 = 8-4-3= 1+2-3 = 4+5-64-3+2= 5-3+6 = 3+2-4 = 8-5+3= 9-8+7= 5+4-7= 2+3+5= 10-3-4=10-2-6= 10-8+1 = 9-3-2= 9-4+1 =9-8+6二9-4-5= 2+4+3= 8+2-1 =8-4+6二8-8+5= 8-4-2= 7-1+3=4+3-3= 5+3-4=3+5-6= 7-4-3= 7+2-9= 6-4-1 = 6+3-5= 6+1+3= 7-7+3= 8+0-0= 8+2-10= 9-8+1 = 4+5-3= 7-6+6= 3-2+5= 5+3-2= 5+4+1= 4-3+6= 9-4-4= 9-8+4= 8-7+4= 3+7-5=。
10以内加减法练习题㈠5+4= 3+6= 4+2= 9+0= 2+7=1+7= 6+4= 7+3= 2+3= 0+10= 10-2= 9-3= 8-7= 9-5= 6-2=5-4= 10-9= 7-3= 8-4= 7-6=3+( )=10 0+( )=4 4+( )=9 1+( )=8 6+( )=10 4+( )=8 5+( )=7 10+( )=10 2+( )=6 3+( )=5 2+( )=9 4+( )=6 3+( )=3 7+( )=8 6+( )=9 1+( )=10 8+( )=9 5+( )=10 6+( )=7 3+( )=10 ( )+5=10 ( )+2=5 ( )+6=9 ( )+8=10 ( )+3=8 ( )+6=6 ( )+7=8 ( )+0=5 ( )+1=7 ( )+4=610以内加减法练习题㈡( )+2=9 ( )+2=8 ( )+3=7 ( )+3=8 ( )+2=9 ( )+3=10 ( )+2=4 ( )+6=7 ( )+7=10 ( )+0=6 9-( )=2 6-( )=1 10-( )=8 7-( )=6 5-( )=2 7-( )=7 10-( )=5 9-( )=0 10-( )=4 3-( )=2 9-( )=5 0-( )=0 8-( )=2 10-( )=3 5-( )=1 6-( )=4 7-( )=4 9-( )=7 4-( )=4 8-( )=4 ( )-3=3 ( )-6=2 ( )-7=3 ( )-0=6 ( )-5=5 ( )-9=1 ( )-3=0 ( )-3=5 ( )-5=1 ( )-1=8 ( )-2=7 ( )-4=3 ( )-2=7 ( )-6=4 ( )-0=10 ( )-3=6 ( )-6=1 ( )-5=4 ( )-7=0 ( )-1=810以内加减法练习题㈢( )+5=10 ( )+4=7 ( )-3=3 ( )-6=2 9-( )=2 3+( )=10 6-( )=1 ( )-7=3 ( )+2=5 0+( )=4 ( )-0=6 10-( )=8 4+( )=9 7-( )=6 ( )-3=0 ( )+7=8 5-( )=2 ( )-5=5 ( )+6=9 1+( )=8 7-( )=7 6+( )=10 ( )+2=8 ( )-3=4 3+( )=4 9-( )=0 ( )+6=7 4+( )=8 ( )-9=1 ( )-3=5 ( )+1=4 ( )-7=4 ( )+8=10 9-( )=4 ( )-5=1 4+( )=10 ( )+5=5 ( )-2=5 10-( )=2 ( )-6=4 ( )-4=2 7-( )=2 10-( )=1 ( )+3=8 5+( )=7 ( )+3=9 2+( )=9 ( )-7=2 ( )-3=0 6-( )=210以内加减法练习题㈣3-( )=2 10-( )=4 ( )-1=8 10+( )=10 ( )+7=8 5+( )=9 ( )+5=7 10-( )=3 ( )-2=7 9-( )=5 ( )+3=3 4+( )=10 ( )-9=1 ( )-3=4 8-( )=2 10-( )=5 ( )-7=2 5+( )=8 ( )+2=7 ( )-6=1 ( )+1=7 4+( )=4 ( )-0=10 9-( )=1 ( )+4=6 ( )+5=10 ( )-6=4 4+( )=6 10-( )=3 9-( )=8 4+( )=5 ( )+5=6 ( )-4=2 8-( )=2 ( )+6=6 ( )-4=3 6+( )=7 6-( )=3 ( )+3=9 1+( )=8 ( )+2=9 ( )-2=4 7-( )=7 2+( )=10 3+( )=5 0-( )=0 10-( )=3 ( )+2=7 0+( )=5 ( )-2=710以内加减法口算练习题㈤2+6=9-7= 3+2=3+4=5+4=3+5=7+1= 9-3= 8-3= 5-4= 8-2=0+8=3+1= 6+1=7+3=10-2=7-2=6-4=9-2=10-9=5+5=5+2=9-4=8+1=2-1=4+6= 2+7=9-5=3+3=4-2=10-4= 1+2=5-3= 0+8=10-7=2+4=6-5=4+4=5-1=1+9=10以内加减法口算练习题㈥8-4=6+0=3-3= 1+5=10-5=1+1=8+1=4-1=9-3=3+6=2+6= 9-7=3+2=3+4=5+4=3+5=7+1=9-3=8-3=5-4=8-2=0+8=3+1=6+1=7+3=10-2=7-2=6-4=9-2= 10-9=5+5=5+2=9-4=8+1=2-1=4+6=2+7= 9-5=3+3=4-2=10-4= 1+2= 5-3= 0+8= 10-7= 2+4= 6-5= 4+4=10以内加减法口算练习题㈦5-1=1+9=8-4=6+0=3-3=1+5=10-5=1+1=8+1=4-1=9-3=3+6=3+6=9-7=3+2= 3+4=5+4=3+5=7+1=9-3=8-3=5-4= 8-2=0+8=3+1=6+1=7+3=10-2=7-2=6-4=9-2=10-9=5+5=5+2=9-4=8+1=2-1=4+6=2+7=9-5=3+3=4-2=10-4= 1+2=10以内加减法口算练习题㈧8-4=6+0=3-3=1+5=10-5=1+1=8+1=4-1=9-3=3+6=1+4=1+5=1+6=1+7= 1+8=1+9=2+1=2+2=2+3=2+4=2+5=2+6=2+7=2+8=3+1=3+2=3+3=3+4=3+5=3+6=3+7=4+1=4+2=4+3=4+4=4+5=4+6=7-1=7-2=7-3=7-4=7-5=7-6=7-7=10以内加减法口算练习题㈨5-4= ( )-2=8 ( )+8=8 3+( )=8 6+1=7+3=10-2=7=2+( )9-2=10-9=5+()=9 8+1=2-1=4+6= 2+()=8 3+3=4-2=10=( )+6 ()+2=9 0+8=10-7=()+()=7 5-1=1+9=1+5=10-5=()-()=1 9-3=3+6=3+4=5+4=8-3=5-4= 6+1=7+3=7-()=5 9-2=10-9=9=4+()8+1=6-1=6-2=6-3=6-4=10以内加减法练习题㈩( )-0=6 10-( )=8 4+( )=9 7-( )=6 ( )-3=0 ( )+7=8 5-( )=2 ( )-5=5 ( )+6=9 1+( )=8 7-( )=7 6+( )=10 ( )+2=8 ( )-3=4 3+( )=4 9-( )=0 ( )+6=7 4+( )=8 ( )-9=1 ( )-3=5 ( )+1=4 ( )-7=4 ( )+8=10 9-( )=4 ( )-5=1 4+( )=10 ( )+5=5 ( )-2=5 10-( )=2 ( )-6=4 ( )-4=2 7-( )=2 10-( )=1 ( )+3=8 5+( )=7 ( )+3=9 2+( )=9 ( )-7=2 ( )-3=0 6-( )=2 3-( )=2 10-( )=4 ( )-1=8 10+( )=10 ( )+7=810以内加减法练习题(十一)5+( )=9 ( )+5=7 10-( )=3 ( )-2=7 9-( )=5 ( )+3=3 4+( )=10 ( )-9=1 ( )-3=4 8-( )=2 10-( )=5 ( )-7=2 5+( )=8 ( )+2=7 ( )-6=1 ( )+1=7 4+( )=4 ( )-0=10 9-( )=1 ( )+4=6 ( )+5=10 ( )-6=4 4+( )=6 10-( )=3 9-( )=8 4+( )=5 ( )+5=6 ( )-4=2 8-( )=2 ( )+6=6 ( )-4=3 6+( )=7 6-( )=3 ( )+3=9 1+( )=8 ( )+2=9 ( )-2=4 7-( )=7 2+( )=10 3+( )=5 0-( )=0 10-( )=3 ( )+2=7 0+( )=5 ( )-2=7 5+4= 3+6= 4+2= 9+0= 2+7=10以内加减法练习题(十二)1+7= 6+4= 7+3= 2+3= 0+10=10-2= 9-3= 8-7= 9-5= 6-2=5-4= 10-9= 7-3= 8-4= 7-6=3+( )=10 0+( )=4 4+( )=9 1+( )=8 6+( )=104+( )=8 5+( )=7 10+( )=10 2+( )=6 3+( )=5 2+( )=9 4+( )=6 3+( )=3 7+( )=8 6+( )=91+( )=10 8+( )=9 5+( )=10 6+( )=7 3+( )=10 ( )+5=10 ( )+2=5 ( )+6=9 ( )+8=10 ( )+3=8 ( )+6=6 ( )+7=8 ( )+0=5 ( )+1=7 ( )+4=6 ( )+2=9 ( )+2=8 ( )+3=7 ( )+3=8 ( )+2=910以内加减法练习题(十三)( )+3=10 ( )+2=4 ( )+6=7 ( )+7=10 ( )+0= 69-( )=2 6-( )=1 10-( )=8 7-( )=6 5-( )=27-( )=7 10-( )=5 9-( )=0 10-( )=4 3-( )=29-( )=5 0-( )=0 8-( )=2 10-( )=3 5-( )=16-( )=4 7-( )=4 9-( )=7 4-( )=4 8-( )=4( )-3=3 ( )-6=2 ( )-7=3 ( )-0=6 ( )-5=5( )-9=1 ( )-3=0 ( )-3=5 ( )-5=1 ( )-1=8( )-2=7 ( )-4=3 ( )-2=7 ( )-6=4 ( )-0=10( )-3=6 ( )-6=1 ( )-5=4 ( )-7=0 ( )-1=( )+5=10 ( )+4=7 ( )-3=3 ( )-6=2 9-( )=23+( )=10 6-( )=1 ( )-7=3 ( )+2=5 0+( )=410以内加减法口算比赛㈠20以内加减法口算练习题㈡6+9= 5+8= 7+3= 6+6= 9+5= 7+9= 8+8= 5+8= 14-9= 17-6= 4+7= 9+4= 6+8= 9+7= 7+8= 9+8= 4+6= 5+3= 6+8= 17-5= 3+7= 6+8= 9+6= 2+8= 6+9= 14-6= 5+7= 4+7= 7+9= 15-8= 6+9= 8+4= 9+8= 8+5= 9+11= 16-7= 13-7= 7+4= 8+3= 17-6= 19-8= 8+5= 9+5= 8+6= 7+14= 8+2= 4+7= 3+9= 12-8= 5+820以内加减法口算练习题㈢3+5= 13-6= 6+9= 9+5= 13-8= 4+6= 9+9= 8+7= 4+7= 6+3= 12-9= 9-3= 8+3= 5+7= 5+6= 6+8= 9+2= 7+4= 5+5= 4+9= 10+6= 9+5= 10+4= 6+10= 8+5= 14-6= 7+2= 6+5= 6+8= 9+6= 8+5= 3+6= 8+5= 7+9= 5+7= 6+8= 4+7= 5+9= 9+4= 7+8= 6+5= 4+9= 5+7= 7+7= 8+4= 5+3= 2+7= 6+4= 7+4= 3+6=20以内加减法口算练习题㈣13-6= 18-9= 11-7= 6+9= ()+5=12 17-9= 13-6= 14-5 = 15-6= 18-()=9 12-9= 12+8= 11-9= 4+8= 5+()=14 16-4= 7+9= 16-7= 2+17= 11-()=5 12-8= 17-8= 18-1= 17-8= 17-()=10 15-7= 10-4 = 14+6 = 16-9= 14+()=18 15+5= 16-8= 14-7 = 12+8 = ()+8=12 8+6= 14-10 = 8+8= 14-9= ()-12=3 7+5= 14-4= 11+9 = 11-6= ()-8=820以内加减法口算练习题㈤17+1 = 15-8= 16+3= 5+8= ()+5=18 9+2= 8+4= 7+5= 6+6= 5+6=15-9= 14-8= 12-7= 11-6= 13-5= 9+4= 7+8= 7+7= 6+5= 5+7= 12-9= 16-8= 15-7= 14-6= 11-5= 9+6= 8+8= 7+6= 6+8= 5+8= 16-9= 11-8= 13-7= 15-6= 12-5= 9+8= 5+8= 7+4= 6+9= 5+9=20以内加减法口算练习题㈥13-9= 13-8= 14-7= 12-6= 14-5= 9+3= 9+8= 7+8= 6+7= 4+9= 11-9= 12-8= 16-7= 13-6= 15-5= 14-9= 15-8= 17-10= 12-3= 11-4= 11-3= 12-4= 13-4= 11-2= 14-10= 4+8= 5+7= 2+9= 7+5= 8+6= 14-6= 12-5= 11-5= 13-8 15-6= 7+7= 9+9= 9+6= 8+5= 8+9= 11-5= 12-6= 14-9= 16-9= 15-8=20以内加减法口算练习题㈦4+7= 6+6= 8+8= 9+3= 7+7=14-8= 15-6= 16-9= 17-8= 18-9= 9+9= 7+5= 8+6= 5+9= 13-8= 17-10= 16-1= 16-2= 16-3= 16-4= 1+11= 1+12= 1+13= 1+14= 1+15= 20-10= 19-1= 19-2= 19-3= 19-4= 18-5= 18-6= 18-7= 18-8= 18-9= 17-5= 17-6= 17-7= 17-8= 17-9= 6-2= 6-3= 6-4= 6-5= 6-6=20以内加减法口算练习题㈧16-10= 15-1= 15-2= 15-3= 15-4= 2+7= 2+8= 2+9= 2+10= 2+11= 15-10= 14-1= 14-2= 14-3= 14-4= 1+16= 1+17= 1+18= 1+19= 2+0= 19-5= 19-6= 19-7= 19-8= 19-9= 2+12= 2+13= 2+14= 2+15= 2+16= 15-5= 15-6= 15-7= 15-8= 15-9= 18-10= 17-1= 17-2= 17-3= 17-4=20以内加减法口算练习题㈨2+17= 2+18= 3+3= 3+4= 3+5= 19-10= 18-1= 18-2= 18-3= 18-4= 3+16= 3+17= 4+4= 4+5= 4+6= 13-5= 13-6= 13-7= 13-8= 13-9= 4+7= 4+8= 4+9= 4+10= 4+11= 13-10= 12-1= 12-2= 12-4= 12-5= 4+12= 4+13= 4+14= 4+15= 4+16= 11-1= 11-2= 11-3= 11-4= 11-5=加减法混合练习题㈩6-5=6-6=5-1=5-2=5-3=10-6=10-8=2+( )=9 9=7+()3+( )=10 3+4=5+4=3+( )=8 7+( )=9 9=3+( ) 8-3= 5-3=0+8=10-7=2+4=6-5=4+4= 5-1=1+9=6+5+3= 7+2+1= 1+3+5= 4+5+2=8-2+1= 9-5+5= 9-9+5= 8-6+3=5+5+3= 6+7-3= 9-9+9= 5+5-5= 10-5-3= 7+3-8= 3+5-4= 6+5-3=。