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

2022-12-16

1 小数加减法[2]答案

最佳答案:

  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