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Cioroianuirinaid

a)

1×40=40

2×20=40

4×10=40

5×8=40

1×60=60

2×30=60

3×20=60

4×15=60

5×12=60

6×10=60

1×90=90

2×45=90

3×30=90

5×18=90

6×15=90

9×10=90

b)

5:1=5

10:2=5

15:3=5

20:4=5

25:5=5

30:6=5

35:7=5

40:8=5

45:9=5

8:1=8

16:2=8

24:3=8

32:4=8

40:5=8

48:6=8

56:7=8

64:8=8

72:9=8

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