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浙教版五年级上册数学第一章小数的意义与加减法【8】小数加减法[2]作业本答案

1小数加减法[2]答案

用简便方法计算 

1.75+0.43+3025

=(1.75+3.25)+0.43 

=5+0.43

=5.43 

3.4+2.7+6.6

=(3.4+6.6)+2.7 

=10+2.7

=12.7 

8.04-0.67-1.33

=8.04-(0.67+1.33) 

=8.04-2

=6.04 

23-5.61-4.39

=23-(5.61+4.39)

=23-10

=13 

3.84+5.29+4.71

=3.84+(5.29+4.71)

=3.84+10

=13.84 

6.7+3.08+6.92

=6.7+(3.08+6.92)

=6.7+10

=16.7 

15.62-0.35-5.62

=(15.62-5.62)-0.35

=10-0.35

=9.65 

40.7-3.27-1.73

=40.7-(3.27+1.73)

=40.7-5

=35.7 

9.37-(4.6+1.37)

=9.37-4.6-1.37

=(9.37-1.37)-4.6

=8-4.6

=3.4 

11.62-(5.62+3.1)

=(11.62-5.62)-3.1

=6-3.1

=2.9 

6.91-(3.91+0.48)

=(6.91-3.91)-0.48

=3-0.48

=2.52 

9.83-(4.7+2.83)

=(9.83-2.83)-4.7

=7-4.7

=2.3 

11.9+5.36+4.64+8.1

=(11.9+8.1)+(5.36+4.64)

=20+10

=30 

13.4+0.57+1.43+1.6

=(13.4+1.6)+(0.57+1.43)

=15+2

=17 

18.4-0.7-1.2-1.1

=18.4-(0.7+1.2+1.1)

=18.4-3

=15.4 

15-7.8-1.15-1.05

=15-(7.8+1.15+1.05)

=15-10

=5

五年级上册数学作业本答案浙教版

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