2. 0,72 + 6/10 × 45%=
3. 4 2/3 + 0,42 ÷ 80% =
bantu jawab kak hari ini dikumpul..
[tex]1. \: \: (\frac{12}{5} \times 40\% )- 0.23 \\ \\ = ( \frac{12}{5} \times \frac{40}{100} ) - \frac{23}{100} \\ \\ = ( \frac{12}{5} \times \frac{2}{5} ) - \frac{23}{100} \\ \\ = \frac{24}{25} - \frac{25}{100} \\ \\ = \frac{96 - 25}{100} = \frac{71}{100} [/tex]
[tex]2. \: \: 0.72 + \frac{6}{10} \times 45\% \\ \\ = \frac{72}{100} + \frac{6}{10} \times \frac{45}{100} \\ \\ = \frac{18}{25} +( \frac{3}{5} \times \frac{9}{20} ) \\ \\ = \frac{18}{25} + \frac{27}{100} \\ \\ = \frac{72 - 27}{100} = \frac{45}{100} = \frac{9}{20} [/tex]
[tex]3. \: \: 4 \frac{2}{3} + 0.42 \div 80\% \\ \\ = \frac{14}{3} + \frac{42}{100} \div \frac{80}{100} \\ \\ = \frac{14}{3} + \frac{21}{50} \div \frac{4}{5} \\ \\ = \frac{14}{3} + ( \frac{21}{50} \times \frac{5}{4} ) \\ \\ = \frac{14}{3} + \frac{21}{40} \\ \\ = \frac{560 + 63}{120} = \frac{623}{120} = 5 \frac{23}{120} [/tex]
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