问题 解答题
口算:
7
9
×45
=
1-2×
1
3
=
1
15
÷
1
3
=
7
9
×
5
7
=
2
5
÷2
=
1.25×8=0.2+1.03=50÷10%=
答案

7
9
×45
=35
1-2×
1
3
=
1
3
1
15
÷
1
3
=
1
5
7
9
×
5
7
=
5
9
2
5
÷2
=
1
5
1.25×8=100.2+1.03=1.2350÷10%=500
故答案为:35,
1
3
1
5
5
9
1
5
,10,1.23,500.

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