Question

rezolva scăderile făcând proba prin scădere 80-20,70-20,60-10,90-40,60-40?​

Answer 1

Răspuns:

80-20=60

80-60=20

70-20=50

70-50=20

60-10=50

60-50=10

90-40=50

90-50=40

60-40=20

60-20=40