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Scrie impartirile ca scaferi repetate ,apoi calculeaza : 25:5= ,18:2= ,20:4= ,21:3= ,42:6= 16:4= ,28:4= ,42:7= ,18:9= ,40:5= ,32:8= ,45:9=, 81:9= ,20:5= ,28:7=​

Răspuns :

Daniel201793ask

Explicație pas cu pas:

25:5=5

25-5-5-5-5-5=0

18:2=9

18-9-9=0

20:4=5

20-5-5-5-5=0

21:3=7

21-7-7-7=0

42:6=7

42-7-7-7-7-7-7=0

16:4=4

16-4-4-4-4=0

28:4=7

28-7-7-7-7=0

42:7=6

42-6-6-6-6-6-6-6=0

18:9=2

18-2-2-2-2-2-2-2-2-2=0

40:5=8

40-8-8-8-8-8=0

32:8=4

32-4-4-4-4-4-4-4-4=0

45:9=5

45-5-5-5-5-5-5-5-5-5=0

81:9=9

81-9-9-9-9-9-9-9-9-9=0

20:5=4

20-4-4-4-4-4=0

28:7=4

28-4-4-4-4-4-4-4=0

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