Question

3/8 x 5 +4 1/6 x 2 1/10 - 9/20 x 6

Answer 1

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Answer 2

$frac{3}{8}cdot5+4frac{1}{6}cdot2frac{1}{10}-frac{9}{20}cdot6=7frac{37}{40}=7,925$

 

1) $frac{3}{8}cdot5=frac{3cdot5}{8}=frac{15}{8}=1frac{7}{8}$

 

2) $4frac{1}{6}cdot2frac{1}{10}=frac{25}{6}cdotfrac{21}{10}=frac{25cdot21}{6cdot10}=frac{5cdot7}{2cdot2}=frac{35}{4}=8frac{3}{4}$

 

3) $frac{9}{20}cdot6=frac{9cdot6}{20}=frac{54}{20}=frac{27}{10}=2frac{7}{10}$

 

4) $1frac{7}{8}+8frac{3}{4}=frac{15}{8}+frac{35}{4}=frac{15+70}{8}=frac{85}{8}=10frac{5}{8}$

 

5) $10frac{5}{8}-2frac{7}{10}=frac{85}{8}-frac{27}{10}=frac{425-108}{40}=frac{317}{40}=7frac{37}{40}$