题目内容
| (25+2.5)×0.4 | 1.25×7.2 | 3.75×2.9+2.9×6.25 |
| 3.25+110.4÷(3.2×2.3) | 2.5×54.8-2.5×14.8 | 6.3÷(13-3.15÷0.3) |
(1)(25+2.5)×0.4,
=25×0.4+2.5×0.4,
=10+1,
=11;
(2)1.25×7.2,
=1.25×8×0.9,
=10×0.9,
=9;
(3)3.75×2.9+2.9×6.25,
=2.9×(6.25+3.75),
=2.9×10,
=29;
(4)3.25+110.4÷(3.2×2.3),
=3.25+110.4÷7.36,
=3.25+15,
=18.25;
(5)2.5×54.8-2.5×14.8,
=2.5×(54.8-14.8),
=2.5×40,
=100;
(6)6.3÷(13-3.15÷0.3),
=6.3÷(13-10.5),
=6.3÷2.5,
=2.52.
=25×0.4+2.5×0.4,
=10+1,
=11;
(2)1.25×7.2,
=1.25×8×0.9,
=10×0.9,
=9;
(3)3.75×2.9+2.9×6.25,
=2.9×(6.25+3.75),
=2.9×10,
=29;
(4)3.25+110.4÷(3.2×2.3),
=3.25+110.4÷7.36,
=3.25+15,
=18.25;
(5)2.5×54.8-2.5×14.8,
=2.5×(54.8-14.8),
=2.5×40,
=100;
(6)6.3÷(13-3.15÷0.3),
=6.3÷(13-10.5),
=6.3÷2.5,
=2.52.
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