\(\dfrac{2\times4}{1\times4}+\dfrac{-3}{4}=\dfrac{8}{4}+\dfrac{-3}{4}=\dfrac{5}{4}\)
phân số :
5/4
hỗn số: 1 1/4
thập phân: 1,25
2+\(\dfrac{-3}{4}\)=\(\dfrac{8}{4}\)+\(\dfrac{-3}{4}\)
=\(\dfrac{8+\left(-3\right)}{4}\)
= \(\dfrac{8-3}{4}\)
= \(\dfrac{5}{4}\)