Răspuns :
a
28÷7=4 42 ÷7=6 49 ÷7=7 63 ÷7 =9 70 ÷7=10
b
28 -7=21 42 -7=35 49-7=42 63 -7=56 70-7 =63
28÷7=4 42 ÷7=6 49 ÷7=7 63 ÷7 =9 70 ÷7=10
b
28 -7=21 42 -7=35 49-7=42 63 -7=56 70-7 =63