题目内容
怎样简便就怎样计算
| 0.75×4×0.25×4 | 9.6+9.6×99 | 15.58÷8.2-0.72 | 2.8×3.6+1.4×2.8 | 6.3×10.1. |
(1)0.75×4×0.25×4,
=(0.75×4)×(0.25×4),
=3×1,
=3;
(2)9.6+9.6×99,
=9.6×(1+99),
=9.6×100,
=960;
(3)15.58÷8.2-0.72,
=1.9-0.72,
=1.18;
(4)2.8×3.6+1.4×2.8,
=2.8×(3.6+1.4),
=2.8×5,
=14;
(5)6.3×10.1,
=6.3×(10+0.1),
=6.3×10+6.3×0.1,
=63+0.63,
=63.63.
=(0.75×4)×(0.25×4),
=3×1,
=3;
(2)9.6+9.6×99,
=9.6×(1+99),
=9.6×100,
=960;
(3)15.58÷8.2-0.72,
=1.9-0.72,
=1.18;
(4)2.8×3.6+1.4×2.8,
=2.8×(3.6+1.4),
=2.8×5,
=14;
(5)6.3×10.1,
=6.3×(10+0.1),
=6.3×10+6.3×0.1,
=63+0.63,
=63.63.
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