diet

Either Mai and Hoa can swim very well

\(9\) x \(9=81\)

\(1+2+3+...+n=\dfrac{\left(n+1\right).n}{2}\)

a) Ta có: \(120⋮12,72⋮12,255⋮̸12\Rightarrow120+72+255⋮̸12\)

b) Ta có: 723 chia 12 dư 3; 123 chia 12 dư 3 ⇒ 723 - 123 chia 12 dư 0

fewer

Not only Maria but also her friends play the piano badly.

Both Maria and her friends play the piano badly.

Em đã trả lời :3

\(298157:8=\dfrac{298157}{8}\)

\(1000+600+10=1610\)