题目内容
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(1)725÷5÷5 =725÷25 =29 |
(2)630÷3÷2 =630÷6 =105 |
(3)47×30+57 =1410+57 =1467 |
(4)819÷9×46 =91×46 =4186 |
(5)177+42×30 =177+1260 =1437 |
(6)29×(178-158) =29×20 =580 |
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解方程:
3.2×4+50x=112.8 | 0.3x-0.8×60=72 | 5.9x-2.4x=7 | 5×1.3-2x=5.5. |