题目内容
计算下面各题(能简算的要简算)
(1)
×101-
(2)2.5×2.72+0.24×2.5+1.04×2.5
(3)200-120÷1.6×1.2.
(1)
| 7 |
| 25 |
| 7 |
| 25 |
(2)2.5×2.72+0.24×2.5+1.04×2.5
(3)200-120÷1.6×1.2.
(1)
×101-
,
=
×(101-1),
=
×100,
=28;
(2)2.5×2.72+0.24×2.5+1.04×2.5,
=2.5×(2.72+0.24+1.04),
=2.5×4,
=10;
(3)200-120÷1.6×1.2,
=200-(120÷4)×(1.2÷0.4),
=200-30×3,
=200-90,
=110.
| 7 |
| 25 |
| 7 |
| 25 |
=
| 7 |
| 25 |
=
| 7 |
| 25 |
=28;
(2)2.5×2.72+0.24×2.5+1.04×2.5,
=2.5×(2.72+0.24+1.04),
=2.5×4,
=10;
(3)200-120÷1.6×1.2,
=200-(120÷4)×(1.2÷0.4),
=200-30×3,
=200-90,
=110.
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