问题 解答题

脱式计算:(能简算的要简算)

437×482+518×437=

8.07-1.65-2.35=

5.65×2.8+4.35×2.8=

40-3.16-(18+2.2)+10.6=

答案

(1)437×482+518×437,

=437×(482+518),

=437×1000,

=437000;

(2)8.07-1.65-2.35,

=8.07-(1.65+2.35),

=8.07-4,

=4.07;

(3)5.65×2.8+4.35×2.8,

=(5.65+4.35)×2.8,

=10×2.8,

=28;

(4)40-3.16-(18+2.2)+10.6,

=40+10.6-(3.16+20.2),

=50.6-23.36,

=27.24.

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