b
一、计算题:
3.09×3.9÷2.6 3.072÷6.4+49.7
69.6÷3.2÷2.5 60.8-36
29×0.72÷0.18 2.16
26.73÷0.9-14.52 4.98+8.64
2.05÷0.82+33.6 1.08
20.6-8.4÷2.1+0.35×2 3.65
÷7.5 ÷0.45÷0.16 ÷2.4 ×0.8÷0.27 ÷〔0.1÷(2.1——2.09)〕b
b
11.6+82×0.61 9.6-7.14×1.2
4.5×3.2×1.6 8.9
1.008÷0.48+3.76 33.48
2.05÷0.82+33.6 13.9-22.78
二、解方程:
7÷X=0.2 9.5X-7X=9
0.7X=56 7X-3X=2.5
×1.2-7.5 ÷0.93÷4.5 ÷6.8 b
b
3X+15=84 X+(X+5)=75
2X-10=43 29+12X=32
2X-0.24=2.28 6X+6=306
9X-5X=0.64 X
X-6.8=12.7 2.5X=100
75X-68X=47.6 11(X+7)=121
÷9.5=3.2 b