Question

cách giải chi tiết của 7 phần 20 + âm 1 phần 4

lẹ giúp mk vs mn

Answer 1

\(=\dfrac{7}{20}-\dfrac{1}{4}=\dfrac{7}{20}-\dfrac{5}{20}=\dfrac{1}{10}\)

Answer 2

\(\dfrac{7}{20}+\dfrac{-1}{4}=\dfrac{7}{20}+\dfrac{-5}{20}=\dfrac{2}{20}=\dfrac{1}{10}\)

Answer 3

=1/10

Answer 4

\(\dfrac{7}{20}+\left(-\dfrac{1}{4}\right)=\dfrac{7}{20}-\dfrac{1.5}{4.5}=\dfrac{7-5}{20}=\dfrac{2}{20}=\dfrac{1}{10}\)

Answer 5

\(\dfrac{7}{20}+\dfrac{\left(-1\right).5}{4.5}=\dfrac{7}{20}+\dfrac{-5}{20}=\dfrac{2}{20}=\dfrac{1}{10}\)