Question

Bài 6 : tính nhanh:

(368 + 764) - (368 + 759)

Answer 1

\(=368+764-368-759=\left(368-368\right)+\left(764-759\right)=0+5=5\)

Answer 2

\(\left(368+764\right)-\left(368+759\right)\)

\(=368+764-368-759\)

\(=\left(368-368\right)+\left(764-759\right)\)

\(=0+5=5\)

Answer 3

5