问题 解答题
口算.
7.2+2.8=
0.27-0.2=4.9+1.01=
0.9-0.6÷2=1.25×0.8=2.5×4=
100÷0.01=1÷0.25×4=3.2×0.2×0.5=
1.8÷0.45÷2=2.4-2.4÷2.4=(1.8+1.7)÷0.7=
答案

7.2+2.8=100.27-0.2=0.074.9+1.01=5.91
0.9-0.6÷2=0.61.25×0.8=12.5×4=10
100÷0.01=100001÷0.25×4=163.2×0.2×0.5=0.32
1.8÷0.45÷2=22.4-2.4÷2.4=1.4(1.8+1.7)÷0.7=5

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