Question

tinh nhanh

30+31+31+32+33+34+35+36+37+38+39

Answer 1

(31+39)+(32+38)+(33+37)+(34+36)+(30+31+35)=70+70+70+70+96=376
 

Answer 2

30+31+32+33+34+35+36+37+38+39

=30+(31+39)+(32+38)+(33+37)+(34+36)+35

=30+70+70+70+70+35

=30+280+35

=310+35

=345

    

Answer 3

(31 + 39) + (32 + 38) + (33 + 37) + (34 + 36) + (31 + 30 + 35) = 70 + 70 + 70 + 70 + 96 = 376

Answer 4

lay 30 31 32 .... o dau vay

Answer 5

Thì bằng 376