Question

3 phần 8 +9 phần 5 =?           5 phần 7 -4 phần 9=?

 

2- 5 phần 6 =?                7 phần 8 + 3 phần 4 =

Answer 1

3/8+9/5=87/40

2-5/6=7/6

5/7-4/9=17/63

7/8+3/4=13/8

Answer 2

\(\frac{3}{8}+\frac{9}{5}=\frac{15}{40}+\frac{72}{40}=\frac{87}{40}\)

\(\frac{5}{7}-\frac{4}{9}=\frac{45}{63}-\frac{28}{63}=\frac{17}{63}\)

\(2-\frac{5}{6}=\frac{12}{6}-\frac{5}{6}=\frac{7}{6}\)

\(\frac{7}{8}+\frac{3}{4}=\frac{7}{8}+\frac{6}{8}=\frac{13}{8}\)

Answer 3

\(\frac{3}{8}\)+ \(\frac{9}{5}\)= \(\frac{12}{40}\)+\(\frac{72}{40}\)=\(\frac{87}{40}\)

\(\frac{3}{4}\)-\(\frac{4}{9}\)=\(\frac{45}{63}\)- \(\frac{28}{63}\)= \(\frac{17}{63}\)

2 - \(\frac{5}{6}\)= \(\frac{12}{6}\)- \(\frac{5}{6}\)= \(\frac{7}{6}\)

\(\frac{7}{8}\)+  \(\frac{3}{4}\)= \(\frac{7}{8}\)+ \(\frac{6}{8}\)= \(\frac{13}{8}\)

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