题目内容
用简便方法计算:
3
×
+
×3
12×2
(
+
)×27.
3
5 |
12 |
4 |
9 |
5 |
9 |
5 |
12 |
12×2
3 |
4 |
(
2 |
9 |
2 |
27 |
①3
×
+
×3
=3
×(
+
)
=3
×1
=3
;
②12×2
=12×
=33;
③(
+
)×27
=
×27+
×27
=6+2
=8.
5 |
12 |
4 |
9 |
5 |
9 |
5 |
12 |
=3
5 |
12 |
4 |
9 |
5 |
9 |
=3
5 |
12 |
=3
5 |
12 |
②12×2
3 |
4 |
=12×
11 |
4 |
=33;
③(
2 |
9 |
2 |
27 |
=
2 |
9 |
2 |
27 |
=6+2
=8.
练习册系列答案
相关题目