问题 解答题
口算
5-2.8=4×0.25=0.46÷4.6=5.8+4.6=
0.32×0.2=32.1×0.3=7.5-0.3=3.2÷0.08=
答案

5-2.8=2.2,4×0.25=1,0.46÷4.6=0.1,5.8+4.6=10.4,
0.32×0.2=0.064,32.1×0.3=9.63,7.5-0.3=7.2,3.2÷0.08=40.

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