问题 解答题
80÷5=______86÷2=______78÷3=______81÷3=______
78+42=______800+1200=______800-420=______696-235=______
36×5=______70×6=______580×4=______109×2=______
1-
4
5
=______
1
4
-
1
4
=______
1
10
+
7
10
=______
1
12
+
5
12
=______.
答案

80÷5=1686÷2=4378÷3=2681÷3=27
78+42=120800+1200=2000800-420=380696-235=461
36×5=18070×6=420580×4=2320109×2=218
1-
4
5
=
1
5
1
4
-
1
4
=0
1
10
+
7
10
=
4
5
1
12
+
5
12
=
1
2
故答案为:16,43,26,27,120,2000,380,461,180,420,2320,218,
1
5
,0,
4
5
1
2

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