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Question 81 Mark
Find:
$35.7\div3=$ ?
Answer
We have, $35.7 \div3$
$
=\frac{357}{10} \times \frac{1}{3}=\frac{357 \times 1}{10 \times 3}=\frac{357}{30}=\frac{119}{10}=11.9
$
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Question 151 Mark
Find:
$5 \frac{1}{6} \div \frac{9}{2}$
Answer
We have,
$
\begin{aligned}
5 \frac{1}{6} \div \frac{9}{2} & =\left(\frac{5 \times 6+1}{6}\right) \div \frac{9}{2}=\frac{31}{6} \div \frac{9}{2} \\
& =\frac{31}{6} \times \frac{2}{9}=\frac{62}{54}=\frac{31}{27}=1 \frac{4}{27}
\end{aligned}
$
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Question 161 Mark
Find:
$2 \frac{1}{2} \div \frac{3}{5}$
Answer
We have,
$ \begin{aligned} 2 \frac{1}{2} \div \frac{3}{5} & =\left(\frac{2 \times 2+1}{2}\right) \div \frac{3}{5}=\frac{5}{2} \times \frac{5}{3}=\frac{5 \times 5}{2 \times 3} \\ & =\frac{25}{6}=4 \frac{1}{6} \end{aligned} $
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Question 171 Mark
Find:
$\frac{1}{2} \div \frac{3}{5}$
Answer
We have, $\frac{1}{2} \div \frac{3}{5}=\frac{1}{2} \times \frac{5}{3}=\frac{1 \times 5}{2 \times 3}=\frac{5}{6}$
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Question 181 Mark
Find:
$\frac{3}{5} \div \frac{1}{2}$
Answer
We have, $\frac{3}{5} \div \frac{1}{2}=\frac{3}{5} \times \frac{2}{1}=\frac{3 \times 2}{5 \times 1}=\frac{6}{5}=1 \frac{1}{5}$
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Question 211 Mark
Find:
$7\div\frac{2}{5}$
Answer
We have, $7 \div \frac{2}{5}=7 \times \frac{5}{2}=\frac{7 \times 5}{2}=\frac{35}{2}=17 \frac{1}{2}$
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Question 221 Mark
Find:
$\frac{3}{4} \times \frac{2}{3}$
Answer
We have, $\frac{3}{4} \times \frac{2}{3}=\frac{3 \times 2}{4 \times 3}=\frac{6}{12}=\frac{1}{2}$
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Question 231 Mark
Find:
$\frac{8}{3} \times \frac{4}{7}$
Answer
We have, $\frac{8}{3} \times \frac{4}{7}=\frac{8 \times 4}{3 \times 7}=\frac{32}{21}$
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Question 241 Mark
Find:
$\frac{2}{3} \times \frac{1}{5}$
Answer
We have, $\frac{2}{3} \times \frac{1}{5}=\frac{2 \times 1}{3 \times 5}=\frac{2}{15}$
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Question 251 Mark
Find:
$\frac{1}{3} \times \frac{4}{5}$
Answer
We have, $\frac{1}{3} \times \frac{4}{5}=\frac{1 \times 4}{3 \times 5}=\frac{4}{15}$
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Question 311 Mark
Find
$5 \times 2 \frac{3}{7}$
Answer
We have,
$
\begin{aligned}
5 \times 2 \frac{3}{7} & =5 \times \frac{2 \times 7+3}{7}=5 \times \frac{14+3}{7} \\
& =5 \times \frac{17}{7}=\frac{5 \times 17}{7}=\frac{85}{7}=12 \frac{1}{7}
\end{aligned}
$
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Question 331 Mark
Find
$\frac{13}{11} \times 6$
Answer
We have, $\frac{13}{11} \times 6=\frac{13 \times 6}{11}=\frac{78}{11}=7 \frac{1}{11}$
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Question 351 Mark
Find
$\frac{9}{7} \times 6$
Answer
We have, $\frac{9}{7} \times 6=\frac{9 \times 6}{7}=\frac{54}{7}=7 \frac{5}{7}$
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Question 371 Mark
Find
$2.73 \div 1.3$
Answer
We have,
$2.73 \div1.3=\frac{273}{100} \div\frac{13}{10}=\frac{273}{100} \times \frac{10}{13}=\frac{273}{130}=2.1$
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Question 381 Mark
Find
$37.8 \div 1.4$
Answer
We have,
$37.8 \div1.4=\frac{378}{10} \div\frac{14}{10}=\frac{378}{10} \times \frac{10}{14}=\frac{378}{14}=27$
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Question 391 Mark
Find
$76.5 \div0.15$
Answer
We have,
$76.5 \div0.15=\frac{765}{10} \div\frac{15}{100}=\frac{765}{10} \times \frac{100}{15}=\frac{7650}{15}$
$
=510
$
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Question 401 Mark
Find
$7.75\div0.25$
Answer
We have,
$7.75+0.25=\frac{775}{100}+\frac{25}{100}=\frac{755}{100} \times \frac{100}{25}=\frac{775}{25}$
$=31$
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Question 411 Mark
Find
$0.5 \div 0.25$
Answer
We have,
$0.5 \div0.25=\frac{5}{10} \div\frac{25}{100}=\frac{5}{10} \times \frac{100}{25}=\frac{50}{25}=2$
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Question 421 Mark
Find
$30.94 \div0.7$
Answer
We have,
$30.94 \div0.7=\frac{3094}{100} \div\frac{7}{10}=\frac{3094}{100} \times \frac{10}{7}=\frac{3094}{70}$ $
=44.2
$
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Question 431 Mark
Find
$3.25 \div0.5$
Answer
We have,
$
\begin{aligned}
3.25 \div0.5 & =\frac{325}{100} \div\frac{5}{10} \\
& =\frac{325}{100} \times \frac{10}{5}=\frac{325}{50}=\frac{65}{10}=6.5
\end{aligned}
$
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Question 441 Mark
Find
$36 \div 0.2$
Answer
We have, $36 \div0.2=\frac{36}{1} \div\frac{2}{10}=36 \times \frac{10}{2}$
$
=\frac{360}{2}=180
$
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Question 451 Mark
Find
$7 \div3.5$
Answer
We have,
$7 \div3.5=\frac{7}{1} \div\frac{35}{10}=\frac{7}{1} \times \frac{10}{35}=\frac{70}{35}=2$
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Question 461 Mark
Find:
$0.5 \div1000$
Answer
We have,
$
\begin{aligned}
0.5 \div1000 & =\frac{5}{10} \times \frac{1}{1000} \\
& =\frac{5}{10000}=0.0005
\end{aligned}
$
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Question 471 Mark
Find:
$128.9 \div1000$
Answer
We have,
$
\begin{aligned}
128.9 \div1000 & =\frac{1289}{10} \times \frac{1}{1000}=\frac{1289}{10000} \\
& =0.1289
\end{aligned}
$
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Question 481 Mark
Find:
$38.53 \div1000$
Answer
We have,
$
\begin{aligned}
38.53 \div1000 & =\frac{3853}{100} \times \frac{1}{1000} \\
& =\frac{3853}{100000}=0.03853
\end{aligned}
$
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Question 491 Mark
Find:
$26.3 \div1000$
Answer
We have,
$
\begin{aligned}
26.3 \div1000 & =\frac{263}{10} \times \frac{1}{1000}=\frac{263}{10000} \\
& =0.0263
\end{aligned}
$
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Question 501 Mark
Find:
$7.9 \div1000$
Answer
We have,
$7.9 \div1000=\frac{79}{10} \times \frac{1}{1000}=\frac{79}{10000}=0.0079$
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1 Marks Question - MATHS STD 7 Questions - Vidyadip