Question

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Answer 1

${\bigstar}$SOLUTION${\bigstar}$

1)ADD :

➠$- \frac{9}{10} + \frac{22}{15}$

as the denominators are different ,we should take LCM in order to add the two fractions .

here , LCM = 30

➠$- \frac{9 \times 3}{10 \times 3} + \frac{22 \times 2}{15 \times 2}$

➠$- \frac{27}{30} + \frac{44}{30}$

➠$\frac{17}{30}$

2)SUBTRACT:

➠$- \frac{3}{8} - \frac{7}{11}$

as the denominators are not same ,we should take LCM in order to subtract these fractions

here , LCM = 88

➠$- \frac{3 \times 11}{8 \times 11} - \frac{7 \times 8}{11 \times 8}$

➠$- \frac{33}{88} - \frac{56}{88}$

➠$- \frac{89}{88}$

3)PRODUCT :

➠$\frac{3}{11} \times \frac{2}{5}$

➠$\frac{6}{55}$

4)DIVIDE :-

➠$- \frac{1}{8} \div \frac{3}{4}$

➠$- \frac{1}{8} \times \frac{4}{3}$

➠$- \frac{1}{3}$

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LEAST COMMON FACTOR :-

• LCM shows the least of the common factors between two operators .

• LCM is applicable only to addition and subtraction

• it is applied when the denominators of two fractions are not same ( unlike fractions )

• with the help of this ,we can easily solve addition and subtraction of unlike fractions