题目内容
灵活计算,能简便计算的要简算
| 3.4×5.9+5.9×6.6 | 54+99×99+45 |
|
(1)3.4×5.9+5.9×6.6,
=(3.4+6.6)×5.9,
=10×5.9,
=59;
(2)54+99×99+45,
=(54+45)+99×99,
=99+99×99,
=99×(1+99),
=99×100,
=9900;
(3)
| 11 |
| 9 |
| 2 |
| 9 |
| 3 |
| 5 |
=
| 11 |
| 9 |
| 2 |
| 9 |
| 3 |
| 5 |
=1-
| 3 |
| 5 |
=
| 2 |
| 5 |
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