Question

212. Efectuează după modelul dat.
MODEL
(12 x 2) + (12 x 3) + (12 x 1) = 12 x 2 + 3+1)= 12 x 6=72
a) (13 x 2) + (13 x 3) + (13 x 1) b) (15 x 1) + (15 2) + (153) c) (14 x 2) + (143) + (14 x 2)​

Answer 1

Răspuns+Explicație pas cu pas:

a) (13x2)+(13x3)+(13x1)=13x(2+3+1)=13x6=78

b) (15x1)+(15x2)+(15x3)=15x(1+2+3)=15x6=90

c) (14x2)+(14x3)+(14x2)=14x(2+3+2)=14x7=98

Answer 2

Salut!

( 13 × 2 ) + ( 13 × 3 ) + ( 13 × 1 ) = 13 × ( 2 + 3 + 1 ) = 13 × 6 = 78

( 15 × 1 ) + ( 15 × 2 ) + ( 15 × 3 ) = 15 × ( 1 + 2 + 3 ) = 15 × 6 = 90

( 14 × 2 ) + ( 14 × 3 ) + ( 14 × 2 ) = 114 × ( 2 + 3 + 2 ) = 14 × 7= 98