问题 解答题
口算,直接写出得数.
64-46=1.72+2.38=0.25×40=2.4÷0.6=
1
5
+
1
4
=
2
3
×12
=
12÷
2
3
=
8×12.5%=2-
8
7
=
0.52=
答案

64-46=18,1.72+2.38=4.1,0.25×40=10,2.4÷0.6=4,
1
5
+
1
4
=
9
20
2
3
×12
=8,
12÷
2
3
=18,
8×12.5%=1,2-
8
7
=
6
7
0.52=0.25.

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