题目内容
用简便方法计算
| 162+72+38 | 78×5×2 | 125×32. |
(1)162+72+38,
=(162+38)+72,
=200+72,
=272;
(2)78×5×2,
=78×(5×2),
=78×10,
=780;
(3)125×32,
=(125×8)×4,
=1000×4,
=4000.
=(162+38)+72,
=200+72,
=272;
(2)78×5×2,
=78×(5×2),
=78×10,
=780;
(3)125×32,
=(125×8)×4,
=1000×4,
=4000.
练习册系列答案
相关题目