•1+5= 6
6*3 =18
18-2 =16
•2,5 +5 = 7,5
7,5*3 =22,5
22,5-2 = 20,5
•-4+5 = 1
1*3=3
3-2=1
B. 43+2 = 45
45:3= 15
15-5= 10
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•1+5= 6
6*3 =18
18-2 =16
•2,5 +5 = 7,5
7,5*3 =22,5
22,5-2 = 20,5
•-4+5 = 1
1*3=3
3-2=1
B. 43+2 = 45
45:3= 15
15-5= 10