题目内容
简算
| 102×0.45 | 0.25×3.2×12.5 | 2.5×1.2+2.5×1.8+2.5 | 4.8÷0.5÷6. |
(1)102×0.45,
=100×0.45+2×0.45,
=45+0.9,
=45.9;
(2)0.25×3.2×12.5,
=(0.25×4)×(0.8×12.5),
=1×10,
=10;
(3)2.5×1.2+2.5×1.8+2.5,
=2.5×(1.2+1.8+1),
=2.5×4,
=10;
(4)4.8÷0.5÷6,
=4.8÷(0.5×6),
=4.8÷3,
=1.6.
=100×0.45+2×0.45,
=45+0.9,
=45.9;
(2)0.25×3.2×12.5,
=(0.25×4)×(0.8×12.5),
=1×10,
=10;
(3)2.5×1.2+2.5×1.8+2.5,
=2.5×(1.2+1.8+1),
=2.5×4,
=10;
(4)4.8÷0.5÷6,
=4.8÷(0.5×6),
=4.8÷3,
=1.6.
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