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2021年2月23日发(作者：刘国江和徐朝清)

7

.

4

−

4

.

7 =

9

63.1-13.8=

5

.

63 + 2

.

21=

0.99

＋

1.1=

8.60-6.39=

1.99+25.7=

8.06+1.37=

13+7.1

=

1.26+5.21=

2.16-0.23=

7

.

1 + 1

.

7 =

5.29+6.33=

1.5+0.5

2.4+1.2=

63.4+52.1=

136.5-105.7

=

8

.

04

−

6

.

87 =

8.65

－

6.31=

10

－

7.64=

1

.

5 + 4

.

5 =

0.3+0.4=

9.6

−

3.5 =

14.3+0.78=

4

.

67

−

1

.

67 =

52.65+9.25=

3.90-2.76=

7.65-4.19=

2.91+5.54=

4.51+2.49=

3.51+0.2=

1.12-1.02=

1.63 + 3.85 =

6.01+5.39=

8+2.5=

7.65+2.13=

8.24+3.76=

0.83+0.68=

7.4

−

6.1 =

2.13-0.02=

6.49-4.81=

1.1 + 2.9 =

5.3-4.8=

8

.

22 + 2

.

11 =

3

.

65 + 6

.

05 =

0.74-6.4=

7.65-6.23=

0.33+9.88=

5

.

82 + 3

.

28 =

63.22-22.77=

7

.

3 + 6

.

3 =

3

.

27

−

1

.

6 =

9.28+7.32=

3-2.3=

8

.

5 + 1

.

2 =

13.6

＋

8.46=

9

.

64 + 6

.

15 =

10-9.05=

0.55-0.33=

7

.

3

−

2

.

6 =

0.96-0.23=

96.3-56.2

=

42.5-19.5

=

8.89-0.20=

7.61 + 6.89 =

3.7 + 6.3 =

2.4+2.66=

0.97+6.13=

0.72+0.91=

3.5 + 2.6 =

75.2-28.3

=

5

.

1

−

3

.

6 =

6.74

−

6.4 =

45.52-22.18=

9+1.5=

5

.

58 + 1

.

12 =

8-7.56=

9.32 + 3.4 =

7.9+53.1=

4.56+14.62=

5

.

8

−

2

.

4 =

63.43-18.18=

5.63-5.21=

0.78+2.2=

4.54+2.55=

8.18 + 1.58 =

7.2+6.9=

3.96+6.04=

7.26-4.93=

0.375+0.625=

1.23+6.52=

1.27+0.31=

=

9.23+5.45=

5

.

8

−

1

.

28 =

42.5-17.8=

6.14-2.01=

3.83+9.45=

7

.

6

−

1

.

2 =

21.43

－

7.56=

2

.

15 + 8

.

85 =

5.86-1.95=

19.8-5.6

=

9

.

34

−

2

.

34=

3

.

25

−

1

.

83 =

103.9+450.1=

2.25 + 1.2 =

9.25+2.25=

56.4+23.1=

102+0.3=

5.40-4.86=

4.5-0.01=

0.41+0.95

69.52-31.48=

8.8

−

6.52 =

45.96-24.41

=

6.97-5.97=

8.78-0.52=

7.94

−

3.35 =

3.85+61.18=

1.12

−

5.64 =

2.98+3.26=

9.36-1.59=

7

.

35 +3

.

35 =

7

.

17 + 1

.

5 =

1.3+8.56=

6.35-5.23=

9

.

19 + 1

.

86 =

5.75-3.05=

96.1-43.2=

0.48+0.29

=

7.24+6.21=

5.15-4.79=

69.12+78.39=

7

.

3

−

6

.

58 =

6

.

19 + 2

.

5 =

10

－

7.64=

4.63+8.92=

4.15+7.08=

2.15+0.45=

4.5-0.9=

7.68-6.50=

108

＋

4.36

＝

4.03-1.97=

5.58+0.13=

0.99

＋

1.1=

4.62+8.95=

7.5-0.5=

6

.

42 + 8

.

18 =

26.65-15.24=

1.72+3.6=

3.51-2.43=

4.9-0.85=

8.42-7.04=

64.2+15.4

=

3

.

12

−

1

.

2 =

6

.

1

−

4

.

6 =

54.49-22.5=

16.36+56.16=

2.44+4.86=

64.25-52.73=

8.49+6.71=

3.51+9.00=

45.46-26.57=

96.4-57.1=

0.45+5.47=

0.3+0.7=

5.03-2.90=

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