题目内容
| 用你喜欢的方法计算. ①8.75-3.9+6.25-7.1 | ②0.08+0.92×5-1.28 | ③(7.4-1.5×2.8)÷0.16 |
| ④79÷125÷8 | ⑤3.87×9+3.87 | ⑥(15.6-8.3)×0.5÷12. |
(1)8.75-3.9+6.25-7.1,
=(8.75+6.25)-(3.9+7.1),
=15-11,
=4;
(2)0.08+0.92×5-1.28,
=0.08+4.6-1.28,
=3.4,
(3)(7.4-1.5×2.8)÷0.16,
=(7.4-4.2)÷0.16,
=3.2÷0.16,
=20;
(4)79÷125÷8,
=79÷(125×8),
=79÷1000,
=0.079;
(5)3.87×9+3.87,
=3.87×(9+1),
=3.87×10,
=38.7;
(6)(15.6-8.3)×0.5÷12,
=7.3×0.5÷12
=
.
=(8.75+6.25)-(3.9+7.1),
=15-11,
=4;
(2)0.08+0.92×5-1.28,
=0.08+4.6-1.28,
=3.4,
(3)(7.4-1.5×2.8)÷0.16,
=(7.4-4.2)÷0.16,
=3.2÷0.16,
=20;
(4)79÷125÷8,
=79÷(125×8),
=79÷1000,
=0.079;
(5)3.87×9+3.87,
=3.87×(9+1),
=3.87×10,
=38.7;
(6)(15.6-8.3)×0.5÷12,
=7.3×0.5÷12
=
| 73 |
| 240 |
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