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910×67.8-54.3÷119+13.5×120%[114+(623-3.75)×517

2022-08-14 03:02:50 问答库 阅读 200 次

问题详情

9

10

×67.8-54.3÷11

9

+13.5×120%
[11

4

+(62

3

-3.75)×51

7

]÷31

4


11

22

÷(91

4

×62

7

-62

7

÷4

29

)
9918

19

÷1

38


1

1

+1

1+2

+1

1+2+3

+1

1+2+3+4

+…+1

1+2+3+…+65

+1

1+2+3+4+…+66

参考答案

(1)910×67.8-54.3÷119+13.5×120%,
=910×67.8-54.3×910+13.5×1.2,
=(67.8-54.3)×910+13.5×1.2,
=13.5×0.9+13.5×1.2,
=13.5×(0.9+1.2),
=13.5×2.1,
=28.35;

(2)[114+(623-3.75)×517]÷314,
=[114+(623-334)×517]÷314,
=[114+3512×367]÷314,
=[114+15]÷314,
=654×413,
=5;

(3)1122÷(914×627-627÷429)÷314,
=12÷(374×447-447×294)÷314,
=12÷[(374-294)×447]÷314,
=12÷[2×447]÷314,
=12×788×413,
=7572;

(4)991819÷138,
=(99+1819)×38,
=99×38+1819×38,
=(100-1)×38+36,
=3800-38+36,
=3800-(38-36),
=3800-2,
=3798;

(5)11+11+2+11+2+3+11+2+3+4+…+11+2+3+…+65+11+2+3+4+…+66,
=2×[(1-12)+(12-13)+(13-14)+…+(166-167)],
=2×(1-167)
=13267.

考点: