题目内容
递等式计算:(能简算的要简算)
| ①0.125×9×8×0.3 | ②4.62÷5÷0.66 |
| ③5.78×2.3+5.78+5.78×6.7 | ④7.75×[20÷(3.24-3.04)]. |
①0.125×9×8×0.3,
=(0.125×8)×(9×8),
=1×72,
=72;
②4.62÷5÷0.66,
=4.62÷(5×0.66),
=4.62÷3.3,
=1.4;
③5.78×2.3+5.78+5.78×6.7,
=5.78×(2.3+1+6.7),
=5.78×10,
=57.8;
④7.75×[20÷(3.24-3.04)],
=7.75×[20÷0.2],
=7.75×100,
=775.
=(0.125×8)×(9×8),
=1×72,
=72;
②4.62÷5÷0.66,
=4.62÷(5×0.66),
=4.62÷3.3,
=1.4;
③5.78×2.3+5.78+5.78×6.7,
=5.78×(2.3+1+6.7),
=5.78×10,
=57.8;
④7.75×[20÷(3.24-3.04)],
=7.75×[20÷0.2],
=7.75×100,
=775.
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