Tentukan hasil operasi hitungdari bilangan berikut

Tentukan hasil operasi hitungdari bilangan berikut

Jawab:

a. $9frac{3}{4}$

b. $13frac{2}{5}$

Penjelasan dengan langkah-langkah:

$a) 5:frac{1}{2}+frac{3}{4}+0,25-1frac{1}{4}\\=5timesfrac{2}{1} +frac{3}{4}+frac{25}{100}-frac{5}{4}\\=10+frac{3}{4}+frac{1}{4}-frac{5}{4}\\=frac{40}{4}+frac{3}{4}+frac{1}{4}-frac{5}{4}\\=frac{39}{4}\\=9frac{3}{4}$

$b) 11frac{2}{5}-frac{2}{5}times2,75:frac{2}{5}+4,75\\=frac{57}{5}-frac{2}{5}timesfrac{275}{100}timesfrac{5}{2}+frac{475}{100}\\=frac{57}{5}-frac{2}{5}timesfrac{11}{4}timesfrac{5}{2}+frac{19}{4}\\=frac{57}{5}-frac{110}{40}+frac{19}{4}\\=frac{57}{5}-frac{11}{4}+frac{19}{4}\\=frac{228}{20}-frac{55}{20}+frac{95}{20}\\=frac{268}{20}\\=frac{67}{5}\\=13frac{2}{5}$