脱式计算(能简算的要简算) 2.4×1.5+3.6×1.5 0.125×2.5×8 7.38-5.14+3.62-2.86 17.2-7.2×
脱式计算(能简算的要简算)2.4×1.5+3.6×1.50.125×2.5×87.38-5.14+3.62-2.8617.2-7.2×0.68.9×9.941.9-2.0...
脱式计算(能简算的要简算) 2.4×1.5+3.6×1.5 0.125×2.5×8 7.38-5.14+3.62-2.86 17.2-7.2×0.6 8.9×9.9 41.9-2.08-7.92.
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①2.4×1.5+3.6×1.5, =1.5×(2.4+3.6), =1.5×6, =9; ②0.125×2.5×8, =(0.125×8)×2.5, =1×2.5, =2.5; ③7.38-5.14+3.62-2.86, =(7.38+3.62)-(2.86+5.14), =11-8, =3; ④17.2-7.2×0.6, =17.2-4.32, =12.88; ⑤8.9×9.9, =8.9×(10-0.1), =8.9×10-8.9×0.1, =89-0.89, =88.11; ⑥41.9-2.08-7.92, =41.9-(2.08+7.92), =41.9-10, =31.9. |
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