6/7+2/3.5/4
=6/7+5/6
=71/42
9/5-6/7:11/7
=9/5-6/11
=69/55
a: =6/7+10/12=72/84+70/84=142/84=71/42
b: =9/5-6/11=99/55-30/55=69/55
6/7+2/3×5/4=6/7+5/6=71/42
9/5−6/7:1/17=/95−6/11=69/55
a) 6/7+2/3.5/4=6/7+5/6=71/42
b) 9/5-6/7:11/7=9/5-6/11=69/55
6/7 + 2/3 x 5/4
= 6/7+ 5/6
= 71/42
9/5 - 6/7 : 11/7
= 9/5 - 6/11
= 69/55
`6/7+2/3. 5/4`
`=6/7+5/6`
`=71/42`
`9/5-6/7:11/7`
`=9/5-6/11`
`=69/55`
\(\dfrac{6}{7}+\dfrac{2}{3}x\dfrac{5}{4}=\dfrac{6}{7}+\dfrac{5}{6}=\dfrac{36}{42}+\dfrac{35}{42}=\dfrac{71}{42}\)
\(\dfrac{9}{5}-\dfrac{6}{7}:\dfrac{11}{7}=\dfrac{9}{5}-\dfrac{6}{11}=\dfrac{99}{55}-\dfrac{30}{55}=\dfrac{69}{55}\)
\(\dfrac{6}{7}+\dfrac{2}{3}\text{x}\dfrac{5}{4}=\dfrac{6}{7}+\left(\dfrac{2}{3}\text{x}\dfrac{5}{4}\right)=\dfrac{6}{7}+\dfrac{5}{6}=\dfrac{36}{42}+\dfrac{35}{42}=\dfrac{71}{42}\)
\(\dfrac{9}{5}-\dfrac{6}{7}:\dfrac{11}{7}=\dfrac{9}{5}-\left(\dfrac{6}{7}:\dfrac{11}{7}\right)=\dfrac{9}{5}-\left(\dfrac{6}{7}\text{x}\dfrac{7}{11}\right)=\dfrac{9}{5}-\dfrac{6}{11}=\dfrac{99}{55}-\dfrac{30}{55}=\dfrac{69}{55}\)
6/7+2/3*5/4= 6/7+5/6=71/72
9/5-6/7:11/7=9/5-6/11=69/55