问题 解答题
口算.
56+47=12.6÷3=0.36÷0.9=910+70=
0.25×0.4=
1
5
×
1
8
=
16×5=1÷0.25=
1
2
+
1
3
=
12+0.8=
答案

56+47=10312.6÷3=4.20.36÷0.9=0.4910+70=980
0.25×0.4=0.1
1
5
×
1
8
=
1
40
16×5=801÷0.25=4
1
2
+
1
3
=
5
6
12+0.8=12.8
故答案为:103,4.2,0.4,980,0.1,
1
40
,80,4,
5
6
,12.8.

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