五上第六讲:解方程

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五上第六讲:解方程(一)
姓名:_______________
例题:
一、在等号的两边填上合适的数或式子。
14 X – 12 = 7 X + 23 3 X + 4 X - 6 = 36 - 5 X 7×(X-8) = 31 + 4 X
14 X-_____=23+______ 3 X+4 X+_____=36+_______ 7 X-____ =_________
________=_________ ___________ =_________ 7 X-____=_________
X = ________ X = _________ _____=_________
X =_________ X =__________ X =_________
X =_________
二、解方程

3 x = 18 12 - x = 4 30 ÷x = 15 x÷3 = 2.1

8 X+5 X=182 7 X=144-5 X 8×(5+ X)=13 X

23 X-21=49+3 X 8(5-x)+15 = 7x-260 100-5 x=3(x-20)
4(x-2)+14=7 x-21 7(x-3)+15=2×(12+ x) 2(x+12)÷20=30
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练习:
1、在等号的两边填上合适的数或式子
15x – 10 = 8x + 11 5x + 6x – 6 = 36 - 3x 9(x-4) = 45 + 6x
15x-_____=11+______ 5 x+6 x+______=36+______ 9 x-____=_________
__________=_________ __________=_________ 9 x-____=_________
X=______ x=________ ______=_________
X=______ x=________ x=________
X=________
2、解方程
0.2x=6 x÷11=3 36 – x = 14 42÷x = 3

5(x+15)=175 8(x-62)=416 7 x = 6 x+4 37 x=75+12 x
43 X+22 X=(25+40)×3 (3 x-25)×3=8 x+99 5 x+19=3(x+4)+15
7(x-3)=3(x+5)+4 (2 x+4)÷18=28 5 x+16=3(x-4)+100