Question

Calculeaza, folosind parantezele:
3×23+3×19=3×(23+19)

6×47-6×21=

2x56+2×19=​

Answer 1

Explicație pas cu pas:

3×23+3×19=3×(23+19) = 3× 42= 126

6×47-6×21= 6x (47-21)= 6×26 = 156

2x56+2×19= 2x (56+19)= 2x 75 = 150

Answer 2

Explicație pas cu pas:

a)

3×23+3×19=3×(23+19)

69+57=3×42

126=126✔

b)

6×47-6×21=6×(47-21)

282-126=6×26

156=156✔

c)

2×56+2×19=2×(56+19)

112+38=2×75

150=150✔