问题 解答题
口算
30×7=
40×8=810-700=208-100=
50+350=34×2=64÷8=300+560=
400+600=102+320=320×3=12×5=
1-
1
3
=
2
4
--
1
4
=
3
9
+
5
9
=
26÷4=
27÷8=
3
8
+
4
8
=
5
7
-
2
7
=
3
5
+
2
5
=
答案

30×7=210;40×8=320;810-700=110;208-100=108;
50+350=400;34×2=68;64÷8=8;300+560=860;
400+600=1000;102+320=422;320×3=960;12×5=60;
1-
1
3
=
2
3
2
4
--
1
4
=
1
4
3
9
+
5
9
=
8
9
26÷4=6…2;
27÷8=3…3;
3
8
+
4
8
=
7
8
5
7
-
2
7
=
3
7
3
5
+
2
5
=1.

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