数学计算题.简算4道(不能简算不简算)!4道脱式计算!谢谢了! 要详细过程哦!

3个回答

  • 简算:

    (1)1.25×0.15×8

    =1.25×8×0.15

    =10×0.15

    =1.5

    (2)36×(5/18+4/9)

    =36×5/18+36×4/9

    =10+16

    =26

    (3)13.8-1/3-2/3

    =13.8-(1/3+2/3)

    =13.8-1

    =12.8

    (4)9.6×4.5+4.5×9.6+9.6

    =9.6×(4.5+4.5+1)

    =9.6×10

    =96

    脱式计算:

    (1)(1.2+2.4×1.5)÷2.4

    =1.2÷2.4+3.4×1.5÷2.4

    =0.5+1.5

    =2

    (2)1.56÷[(2.5-1.2)×2.4]

    =1.56÷[1.3×2.4]

    =1.56÷1.3÷2.4

    =1.2÷2.4

    =0.5

    (3)45÷[(4/5-2/3)×1.5]

    =45÷[2/15×1.5]

    = 45÷1/5

    =225

    (4)(2-1/4×2/3)×(6/5-2/3)

    =(2-1/6)×8/15

    =11/6×8/15

    =44/45