题目内容
| 脱式计算(能简算的要简算) 6.5×99 | 0.7×9.2+0.7×0.8. |
(1)6.5×99,
=6.5×(100-1),
=6.5×100-6.5×1,
=650-6.5,
=643.5;
(2)0.7×9.2+0.7×0.8,
=0.7×(9.2+0.8),
=0.7×10,
=7.
=6.5×(100-1),
=6.5×100-6.5×1,
=650-6.5,
=643.5;
(2)0.7×9.2+0.7×0.8,
=0.7×(9.2+0.8),
=0.7×10,
=7.
练习册系列答案
相关题目