Question

Afla caturile folosind scaderea repetata apoi verifica folosind inmultirea 21:3,36:4,42:6,49:7,63:7,56:8,54:6,81:9​

Answer 1

21:3=7 ( 21-3-3-3-3-3-3-3=0 )

7×3=21

36:4=9 ( 36-4-4-4-4-4-4-4-4-4=0 )

9×4=36

42:6=7 ( 42-6-6-6-6-6-6-6 =0 )

7×6=42

49:7=7 ( 49-7-7-7-7-7-7-7=0 )

7×7=49

63:7=9 ( 63-7-7-7-7-7-7-7-7-7=0 )

9×7=63

56:8=7 ( 56-8-8-8-8-8-8-8=0 )

7×8=56

54:6=9 ( 54-6-6-6-6-6-6-6-6-6=0 )

9×6=54

81:9=9 ( 81-9-9-9-9-9-9-9-9-9=0 )

9×9=81