题目内容
用你喜欢的方法进行计算
| 101×99-99+100 | 3.14×52-3.14×42 | 75%×
|
(1)101×99-99+100,
=(101-1)×99+100,
=100×99+100,
=9900+100,
=10000;
(2)3.14×52-3.14×42,
=3.14×(52-42),
=3.14×(25-16),
=3.14×9,
=28.26;
(3)75%×
+0.2×
,
=75%×(
+0.2),
=75%×1,
=75%.
=(101-1)×99+100,
=100×99+100,
=9900+100,
=10000;
(2)3.14×52-3.14×42,
=3.14×(52-42),
=3.14×(25-16),
=3.14×9,
=28.26;
(3)75%×
| 4 |
| 5 |
| 3 |
| 4 |
=75%×(
| 4 |
| 5 |
=75%×1,
=75%.
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