题目内容
| 拖式计算(第1、2、3、要用简便方法) ①0.6×125+0.4×125 | ②101×1.12 |
| ③36-12.5-17.5 | 9.8÷0.49×0.56 |
| (8.6-6.9)×5.5 | 35.7+3.6÷7.2 |
①0.6×125+0.4×125,
=(0.6+0.4)×125,
=1×125,
=125;
②101×1.12,
=(100+1)×1.12,
=100×1.12+1.12,
=112+1.12,
=113.12;
③36-12.5-17.5,
=36-(12.5+17.5),
=36-30,
=6;
④9.8÷0.49×0.56,
=20×0.56,
=11.2;
⑤(8.6-6.9)×5.5,
=1.7×5.5,
=9.35;
⑥35.7+3.6÷7.2,
=35.7+0.5,
=36.2.
=(0.6+0.4)×125,
=1×125,
=125;
②101×1.12,
=(100+1)×1.12,
=100×1.12+1.12,
=112+1.12,
=113.12;
③36-12.5-17.5,
=36-(12.5+17.5),
=36-30,
=6;
④9.8÷0.49×0.56,
=20×0.56,
=11.2;
⑤(8.6-6.9)×5.5,
=1.7×5.5,
=9.35;
⑥35.7+3.6÷7.2,
=35.7+0.5,
=36.2.
练习册系列答案
相关题目