Question

solve and help please....
solve these 6 questions ​

Answer 1

Answer:

18.90

19.5/7

20.5/2

21.49/13

22.7/12

23.11/20

Answer 2

★ Answer

18) $\frac{15}{\cancel{8}} \times \cancel{48}$

48 = 8 × 6

$\implies 15 \times 6$

$\purple{\implies 90}$

19) $\frac{5}{7} \times 0$

we know that ,

0 multiplied by any number is equal to 0..

$\purple{\implies 0}$

20) $\frac{5}{10} \times \frac{5}{10}$

$\implies \frac{5 \times 5}{10 \times 10}$

$\purple{\implies \frac{25}{100} = \frac{1}{4}}$

21) $2 \frac{2}{13} + 1 \frac{8}{13}$

$2 \frac{2}{13} = \frac{(2 \times 13) + 2}{13}$

$\leadsto \frac{28}{13}$

$1 \frac{8}{13} = \frac{(1 \times 13) + 8}{13}$

$\leadsto \frac{21}{13}$

by replacing mixed fraction with proper fraction ..

$\frac{28}{13} + \frac{21}{13}$

$\implies \frac{(28 + 21)}{13}$

$\implies \frac{49}{13} = 3 \frac{10}{13}$

$\purple{\implies 3 \frac{10}{13}}$

22) $\frac{2}{8} + \frac{8}{24}$

lcm of 8 and 24 = 24

$\frac{2}{8} \times \frac{3}{3}$

$\implies \frac{6}{24}$

$\frac{6}{24} + \frac{8}{24}$

$\frac{(6+8)}{24}$

$\purple{\implies \frac{14}{24}}$

23) $\frac{2}{8} + \frac{3}{10}$

Lcm of 8 and 10 = 40

$\frac{2}{8} \times \frac{5}{5}$

$\leadsto \frac{10}{40}$

$\frac{3}{10} \times \frac{4}{4}$

$\leadsto \frac{12}{40}$

$\frac{10}{40} + \frac{12}{40}$

$= \frac{(10+12)}{40}$

$\purple{\implies \frac{22}{40}}$