loading简便计算(5)
56×1.25 1.25+4.6+0.75 1.6×7.5×1.25
49×0.125×8 0.4×63×2.5 0.5×7.6×20
9.6×100.1 42×10.2 9.8÷0.5÷2
28.4×99+28.4 0.94×2.5-0.9×2.5
4×0.8×12.5×2.5 3.6×101
0.125×72 0.25×39+0.25
简便计算(6)
3.2×0.82+3.2×1.18 1.58×99+1.58
10÷0.2÷2.5 14.5×102 1.25×3.2×0.25
12.15-3.83+0.85-6.17 2.65×1.7+1.35×1.7
3.55×0.4÷3.55×0.4 0.125×0.38×80
18.6-18.6×0.5 3.58×3.6+6.4×3.58
3.05÷0.25÷4 4.25×0.4÷4.25×0.4
解方程（1）
20-X=9 X-1.8=4 15-X=2
2.1÷X=3 X
6X-35=13 3X-12
(100-3X) ÷2=8 6X+3=9 4X-2=10
5X-39=56 18+5X=21 8X-4
7X÷3=8.19 43-X=38 6.3
÷7=0.3 1.6X=6.4 ×6=6 (5X-12) ×8=24 ×14=0 ÷X=7 解方程（2）
7(X-20)=140 6.7X-60.3=6.7 9X+X=0
4(6X+3)=60 2X+23
2X+1.5X=17.5 8X-3X=105 3X+X+6=26
3X+6=18 2X-7.5=8.5 16+8X=40
4X-3×9=29 2(X-2.6)=8 5(X+1.5)=17.5
8(X-6.2)=41.6 (X-3)
×4=134 (3X-4) ÷2=7.5 13.2X+9X=33.3 ×5=4