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Răspuns :

4. a.12÷2+12÷4=6+3=9

b.(42+24)÷6=66÷6=11

5. (36-12):24=24:24=1

Explicație pas cu pas:

4. a) 12:2=6

12:4=3

6+3=9

b)42+24=66

66:6=11

5.36-12=24

24:24=1