问题 解答题
直接写得数.
40×3=500×2=400×5=
75÷8=200-178=210×4=
789×0=389+470=302×3=
25×4=16×2=27÷9=
65-7=760+0=103×5≈
299×4≈6×7+8=
3
9
+
2
9
=
2
7
+
5
7
=
1-
2
3
=
12
12
-
3
8
+
1
8
=
答案

40×3=120500×2=1000400×5=2000
75÷8=9…3200-178=22210×4=840
789×0=0389+470=859302×3=906
25×4=10016×2=3227÷9=3
65-7=58760+0=760103×5≈500
299×4≈12006×7+8=50
3
9
+
2
9
=
5
9
2
7
+
5
7
=1
1-
2
3
=
1
3
12
12
-
3
8
+
1
8
=
3
4

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