题目内容
用简便方法计算.
(1)31.4×0.18+31.4×0.82
(2)
+5.9+4.1+0.75.
(1)31.4×0.18+31.4×0.82
(2)
| 1 |
| 4 |
(1)31.4×0.18+31.4×0.82,
=31.4×(0.18+0.82),
=31.4×1,
=31.4;
(2)
+5.9+4.1+0.75,
=(5.9+4.1)+(0.25+0.75),
=10+1,
=11.
=31.4×(0.18+0.82),
=31.4×1,
=31.4;
(2)
| 1 |
| 4 |
=(5.9+4.1)+(0.25+0.75),
=10+1,
=11.
练习册系列答案
相关题目