计算直接写出结果 2.5×40 = 100 1.25×80 = 100 9÷45 =0.2 10－0.1 =9.9 88÷0.88 =100 9.8＋1.12 =10.92 6.1－0.01 =6.09 0.9×0.01 =0.009 8×0.45 = 0.5＋1÷0.5 = 0.2×3÷0.2×3 = 0.3×0.14 =
(20-0.8)÷3=6.4元
平均每支钢笔6.4元
2.5×40 = 100
1 100
9÷45 =0.2
10－0.1 =9.9
88÷0.88 =100
9.8＋1.1
6.1－0.01 =6.09
0.9×0.01 =
8×0.45 = 3.6
0.5＋1÷0.5 = 2.5
0.2×3÷0.2×3 =9
00.042
