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脱式计算(能简算要简算)①67+215+17+1315②1921+57-314③23+59-

2022-08-14 02:44:58 问答库 阅读 200 次

问题详情

脱式计算(能简算要简算)
6

7

+2

15

+1

7

+13

15

19

21

+5

7

-3

14

2

3

+5

9

-2

3

+5

9

8

9

+(1

4

-1

9

)+3

4

⑤0.58+5

13

+1.12+8

13

⑥11-4

11

-7

11

参考答案

67+215+17+1315
=(67+17)+(215+1315),
=1+1,
=2;

1921+57-314
=1921+(57-314),
=1921+12
=5942

23+59-23+59
=(23-23)+(59+59),
=109

89+(14-19)+34
=89+14-19+34
=(89-19)+(14+34),
=79+1,
=179

⑤0.58+513+1.12+813
=(0.58+1.12)+(513+813),
=1.7+1,
=2.7;

⑥11-411-711
=11-(411+711),
=11-1,
=10.

考点: