3. 脱式计算。
$(285 + 465)÷ 5$ $104× 5÷ 4$ $36 + 24× 15$ $700 - 428÷ 4$
$(285 + 465)÷ 5$ $104× 5÷ 4$ $36 + 24× 15$ $700 - 428÷ 4$
答案
(285 + 465)÷5
=750÷5
=150
104×5÷4
=520÷4
=130
36 + 24×15
=36 + 360
=396
700 - 428÷4
=700 - 107
=593
=750÷5
=150
104×5÷4
=520÷4
=130
36 + 24×15
=36 + 360
=396
700 - 428÷4
=700 - 107
=593
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