Question

tính nhanh : 72 x 26 + 36 x 48

Answer 1

có sai đề ko ạ?

Answer 2

Sửa đề:
\(72\times26+26\times28\)
\(=\left(72+28\right)\times26\)
\(=100\times26\)
\(=2600\)

Answer 3

\(72\times26+36\times48=72\times26+26\times48+480=26\times\left(72+48\right)+480=26\times120+480=26\times120+120\times4=120\times\left(26+4\right)=120\times30=3600\)