Odisha State Board BSE Odisha 7th Class Maths Solutions Chapter 5 ପରିମେୟ ସଂଖ୍ୟା Ex 5.4 Textbook Exercise Questions and Answers.
BSE Odisha Class 7 Maths Solutions Chapter 5 ପରିମେୟ ସଂଖ୍ୟା Ex 5.4
Question 1.
ନିମ୍ନଲିଖ ପରିମେୟ ସଂଖ୍ୟାମାନଙ୍କର ଗୁଣଫଳ ନିର୍ଣ୍ଣୟ କର ।
(କ) \(\frac{7}{24}\) × -16
ସମାଧାନ:
\(=\frac{7}{24} \times \frac{(-16)}{1}=\frac{-16 \times 7}{24 \times 1}=\frac{-8 \times 2 \times 7}{8 \times 3}=\frac{-2 \times 7} {3}=\frac{-14}{3}\)
(ଖ) \(\frac{-3}{5}\) × 2
ସମାଧାନ:
= \(-\frac{3}{5} \times \frac{2}{1}=\frac{-3 \times 2}{5 \times 1}=\frac{-6}{5}=-1 \frac{1}{5}\)
(ଗ) \(\frac{-7}{6}\) × (-24)
ସମାଧାନ:
= \(\frac{(-7)}{6} \times \frac{(-24)}{1}=\frac{(-7) \times(-24)}{6 \times 1}=\frac{7 \times 24}{6}=\frac{7 \times 4 \times 6}{6}\) = 7 × 4 = 28
(ଘ) \(\frac{5}{7} \times\left(\frac{-2}{3}\right)\)
ସମାଧାନ:
= \(\frac{5 \times(-2)}{7 \times 3}=-\frac{-10}{21}\)
(ଙ) \(\frac{9}{8} \times \frac{32}{7}\)
ସମାଧାନ:
= \(\frac{9 \times 32}{8 \times 7}=\frac{9 \times 8 \times 4}{8 \times 7}=\frac{9 \times 4}{7}=\frac{36}{7}=5 \frac{1}{7}\)
(ଚ) \(\frac{50}{7} \times \frac{14}{7}\)
ସମାଧାନ:
= \(\frac{50}{7} \times \frac{2}{1}=\frac{50 \times 2}{7 \times 1}=\frac{100}{7}=14 \frac{2}{7}\)
(ଛ) \(\frac{4}{7} \times \frac{2}{7}\)
ସମାଧାନ:
= \(\frac{4 \times 2}{7 \times 7}=\frac{8}{49}\)
(ଜ) \(\frac{13}{15} \times \frac{25}{26}\)
ସମାଧାନ:
\(=\frac{13 \times 25}{15 \times 26}=\frac{13 \times 5 \times 5}{3 \times 5 \times 2 \times 13}=\frac{5}{3 \times 2}=\frac{5}{6}\)
Question 2.
ସରଳ କର ।
(କ) \(\left(\frac{-16}{15} \times \frac{20}{8}\right)-\left(\frac{15}{5} \times \frac{35}{5}\right)\)
ସମାଧାନ:
(ଖ) \(\left(\frac{13}{8} \times \frac{12}{13}\right)+\left(\frac{-4}{9} \times \frac{3}{2}\right)\)
ସମାଧାନ:
Question 3.
ପ୍ରମାଣ କର x × y = y × x ଯେତେବେଳେ
(କ) x = \(\frac{1}{2}\), y = \(\frac{3}{5}\)
ସମାଧାନ:
(ଖ) x = \(\frac{2}{7}\), y = \(\frac{-11}{8}\)
ସମାଧାନ:
(ଗ) x = \(\frac{3}{5}\), y = \(\frac{2}{9}\)
ସମାଧାନ:
