小学数学五年级上册简便计算及解方程练习题集锦

一、请用简便方法计算下列各题

0.25×0.28 0.125×3.2×2.5 35×40.2

0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5

3.5×101-3.5 3.5

3.5×2.7-3.5×0.7 (32+5.6)

4.9÷3.5 7

7.35÷(7.35×0.25) 7.35

3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5

7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)

×9.9+3.5×0.1 3.5÷0.8 3.5÷0.25÷4 7÷(7.35÷0.25) 7.325-(5.325+1.7) ×2.7+35×0.73 ÷0.6-0.5÷0.6 ÷0.125 ÷8 二、解方程（要注明依据）

12x-8x=4.8 1.2x=81.6 (200-x)÷5=30

x-0.7x=3.6 5.6x=33.6 3.5-5x=2

x+3x+10=70 5x+x=9 9.8-x=3.8

5x-45=100 4.5x-x=28

(x-140)÷70=4 x+2x+18=78 (27.5-

0.5x+8=43 3200=450+5X+X 4

1.5(x+1.6)=3.6 155X-2X=18 91

7(6.5+x)=87.5 9x-x=16 6-2x=11

75.6÷x=12.6 3.5)÷x=4 ÷5x=20 ÷x ＝1.3