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计算下面各题 能简算的要简算．102×45=8.76-5.29-2.71+1.24=3.31

2022-08-14 02:26:16 问答库 阅读 200 次

问题详情

计算下面各题，能简算的要简算．
102×45=8.76-5.29-2.71+1.24=3.31-18.3÷7×0.5=

1-(1

5

+1

3

)×15

8

=24×51

43

+51×19

43

=9

14

÷(5

6

-3

4

)×7

24

=

参考答案

102×45
=100×45+2×45
=4500+90
=4590；

8.76-5.29-2.71+1.24
=8.76+1.24-（5.29+2.71）
=10-8
=2；

3.31-18.3÷7×0.5
=3.31-18310×17×12
=3.31-18310×17×12
=331100-183140
=331100-183140
=2317700-915700
=1402700
=21350；

1-（15+13）×158
=1-15×158-13×158
=1-38-58
=0；

24×5143+51×1943
=24×5143+19×5143
=（24+19）×5143
=43×5143
=51；

914÷（56-34）×724
=914÷112×724
=914×12×724
=94．

考点：