Question

Вычисли удобным способом.
45+38+5+2
6+27+14+3
12+19+8+1

Answer 1

1) (45+5)+(38+2)=50+40=90
2) (6+14)+(27+3)=20+30=50
3) (12+8)+(19+1)=20+20=40

Answer 2

(45+5)+(38+2)=90
(6+14)+(27+3)=50
(19+16)+(12+8)=40