Question

Tính nhanh:

A=26+27+28+29+30+31+32+33.

Answer 1

A = 26 + ( 27 + 33 ) + ( 28 + 32 ) + ( 29 + 31 )  + 31

A = 26 + 60  x 3 + 31

A = 26 + 180 + 31

A = 206 + 31

A= 237

K MÌNH NHA

Answer 2

\(A=26+27+28+29+30+31+32+33\)

   \(=26+\left(27+33\right)+\left(28+32\right)+\left(29+31\right)+30\)

   \(=26+60+60+60+30\)    

    \(=236\)