递等式计算.32.84+52+27.54

1个回答

  • 解题思路:(1)(2)从左往右依次计算.

    (3)先算括号内的加法,然后从左往右依次计算.

    (4)括号内从左往右依次计算,再算括号外的减法.

    (1)32.84+52+27.54

    =84.84+27.54

    =112.38

    (2)27.8+8.56-7.268+0.732

    =36.36-7.268+0.732

    =29.092+0.732

    =29.824

    (3)31.6-(5.08+7.13)-5.08

    =31.6-12.21-5.08

    =19.39-5.08

    =14.31

    (4)40-(3.5-2.85+1.86)

    =40-(0.65+1.86)

    =40-2.51

    =37.49

    点评:

    本题考点: 小数四则混合运算.

    考点点评: 此题考查了小数的四则混合运算,注意运算顺序和运算法则.