计算下列各题,怎样简便就怎样算.(1)4.73+9+27%-4 (2) 1 4 × 17 53 +
计算下列各题,怎样简便就怎样算.(1)4.73+9+27%-4(2)14×1753+3653×25%(3)29×38+0.375+79×37.5%(4)2.5×15+0....
计算下列各题,怎样简便就怎样算.(1)4.73+9+27%-4 (2) 1 4 × 17 53 + 36 53 ×25% (3) 2 9 × 3 8 +0.375+ 7 9 ×37.5% (4)2.5× 1 5 +0.35×20%
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(1)4.73+9+27%-4 =4.73+0.27+9-4 =5+9-4 =10; (2)
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(3)
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=2×
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(4)2.5×
=2.5×0.2+0.35×0.2 =(2.5+0.35)×0.2 =2.85×0.2 =0.57. |
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