脱式计算.(78+52)×(120÷60) (128-72)×12÷48 80-(16.405+14.9) 68.7-(44.6+0.375
脱式计算.(78+52)×(120÷60)(128-72)×12÷4880-(16.405+14.9)68.7-(44.6+0.375)150×40×25×25625÷7...
脱式计算.(78+52)×(120÷60) (128-72)×12÷48 80-(16.405+14.9) 68.7-(44.6+0.375) 150×40×25×2 5625÷75+25×32.
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(1)(78+52)×(120÷60) =130×2 =260; (2)(128-72)×12÷48 =56×12÷48 =672÷48 =14; (3)80-(16.405+14.9) =80-31.305 =48.695; (4)68.7-(44.6+0.375) =68.7-44.975 =23.725; (5)150×40×25×2 =(150×2)×(40×25) =300×1000 =300000; (6)5625÷75+25×32 =75+800 =875. |
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