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Efectuati prin adunare,respectiv scadere repetata operatiile:7x6= ,42:7=, 56:8=, 28:4=, 6x9=, 7x3=.

Răspuns :

7x6=42
42:7=6
56:8=7
28:4=7
6x9=54
7x3=21
7+7+7+7+7+7=42
42-7-7-7-7-7-7-7=6
56-8-8-8-8-8-8-8-8=7
28-4-4-4-4=7
6+6+6+6+6+6+6+6+6=54
7+7+7=21