Question

73. Calculează după model:
a) 56+ 4 = 50 + (6 +4)
= 50 + 10
= 60
39
27 + 3 =
71 + 9 =
45 + 5 =
52 + 8 =
94 + 6 =
83 + 7=​

Answer 1

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Salutare!

27+3=20+(7+3)

20+10

30

71+9=70+(1+9)

70+10

80

45+5=40+(5+5)

40+10

50

52+8=50+(2+8)

50+10

60

94+6=90+(4+6)

90+10

100

83+7=80+(3+7)

80+10

90

#Succes!

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