计算下面各题.27×12-286÷13 (53.76-17.49)÷1.8 (3
计算下面各题.27×12-286÷13(53.76-17.49)÷1.8(339-67)×15÷244000÷125÷815.73-(2.17+0.73)-1.83....
计算下面各题.27×12-286÷13 (53.76-17.49)÷1.8 (339-67)×15÷24 4000÷125÷8 15.73-(2.17+0.73)-1.83.
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(1)27×12-286÷13 =324-22 =302; (2)(53.76-17.49)÷1.8 =36.27÷1.8 =20.15; (3)(339-67)×15÷24 =272×15÷24 =4080÷24 =170; (4)4000÷125÷8 =4000÷(125×8) =4000÷1000 =4; (5)15.73-(2.17+0.73)-1.83 =15.73-2.17-0.73-1.83 =(15.73-0.73)-(2.17+1.83) =15-4 =11. |
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