七上有理数计算题专项练习
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有理数专项训练题
答题规范示例:-17+(-4)×5+(-4)
解:原式=-17+(-4)×(5+1)
=-17-24
=-41
专训1:有理数的加减法
(1)(-3)-4+(-4)-(-18) (2)(-27)+(-3)-5+(-3)+7 (3)3+(-3)+11-16 (4)5-18-5+(-16) (5)9-(-20)+13-5 (6)11-(-17)-6-18 (7)3+13+18+19 (8)(-8)+9-(-11)-1 (9)(-14)-3+13+(-4)
(10)(252)23+1
4
+(
1
-
2
)+(-23)(11)(-
2
3
)+
1
4
+(-
1
2
)+(-
1
8
3
)
(12)(-37)+(-1)+40+(-2)(13)(-7)+(-1.66)+(-113)+(-2.34)
(14)(-6)+8+(-4)+12 (15)-4.2+5.7-8.4+10 (16)(—81
2
)+(
2
9
3
-)
(17)
4131
12
7373
⎛⎫
+-++
⎪
⎝⎭
(18)
101157
+
34612
⎛⎫⎛⎫
-++-
⎪ ⎪
⎝⎭⎝⎭
(19)
919
0.59.75
22
⎛⎫⎛⎫
-++-+
⎪ ⎪
⎝⎭⎝⎭
(20)
12411
+
23523
⎛⎫⎛⎫⎛⎫
-++-+-
⎪ ⎪ ⎪
⎝⎭⎝⎭⎝⎭
(21)211
+1
353
⎛⎫
--+
⎪
⎝⎭
(22) 6.1-3.7-4.9+1.8 (23)23-17-(-7)+(-16)
(24) -216-157+348+512-678 (25) (-26.54)+(-6.4)-18.54+6.4 (26) -31+25+(-69)
(27)0+1-[(-1)-(-3
7
)-(+5)-(-
4
7
)]+|-4|(28)(-4
7
8
)-(-5
1
2
)+(-4
1
4
)-3
1
8
(29)(-12)-(-13)-(+14) (30)-0.5-(-314)+2.75-(+712
)
(31)712143+269696⎛⎫⎛⎫⎛⎫⎛⎫----+- ⎪ ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭⎝⎭ (32)()34187.5213772⎛⎫⎛⎫⎛⎫-+-+-++ ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭
(33) (-23)-(+12)-(-56)-(-13) (34)(-813)-(+12)-(-7012)-(-813
);
(35) 81.26-293.8+8.74+111 (36) (-412)-{32
5
-[(-0.13)-(0.33)]} (37) 5-{-4-[3-7-(4-5)-6]}
专训2:有理数的乘除法
(1)(-9)×32 (2)(-132
)×(-0.26) (3)(-2)×31×(-0.5)
(4)31×(-5)+31×(-13) (5)(-4)×(-10)×0.5×(-3) (6)(-83)×34
×(-1.8)
(7) (-0.25)×(-74)×4×(-7) (8)(-73)×(-54)×(-127
)
(9)(-8)×4×(-21)×(-0.75) (10)(65―43
―97)×36
(11)(-36)×(94+65-127
) (12) 4×(-96)×(-0.25)×481
(13)(74-181+143)×56 (14)25×43-(-25)×21
+25×41
(15)(-66)×〔121
22-(-31)+(-115
)〕
(16)187×(-72)+43×72-65×(-72)+(-97
)×72
(17)0÷[(-341
)×(-7)] (18)-3÷(31-41) (19)(-2476)÷(-6)
(20)2÷(5-18)×181
(21) 131÷(-3)×(-31) (22) 87×(-143)÷(-83)
(23)(43-87)÷(-65) (24)-3.5 ×(61-0.5)×73
÷21 (25)56×(-31-21)÷45
(26)-172
÷(-165)×183×(-7) (27)75÷(-252)-75×125-35÷4
(28)-2÷65
×(-56) (29)(-510)÷(+34)÷(-0.125) (30)2121÷(-141)÷(-13
2);
(31)(-81)÷2×41×(-92) (32)(-321)÷(-121)×331 (33)(-41)×(-2
1)÷(-0.75)