Question

Calculează (în doua moduri)
a) 6x(21+44)=
b)(53+73)x3=
c)10x(11+66)=​

Answer 1

a)

21+44=65

6×65=390

b)

53+73=126

126×3=378

c)

11+66=77

10×77=770

Answer 2

Salut!

Calculeaza în doua moduri :

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❶ 6 × ( 21 + 44 ) = 6 × 65 = 390

❷ 6 × 21 + 6 × 44 = 126 + 264 = 390

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❶ ( 53 + 73 ) × 3 = 126 × 3 = 378

❷ 53 × 3 + 73 × 3 = 159 + 219 = 378

___________________________

❶ 10 × ( 11 + 66 ) = 10 × 77 = 770

❷ 10 × 11 + 10 × 66 = 110 + 660 = 770

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Bafta! =)