Question

вычислите (-4 целых 1/4 +5 целых 2/5)-(3,9*0,1)+1 целая 1/2

Answer 1

$( - 4 frac{1}{4} + 5 frac{2}{5} ) - (3.9 times 0.1) + 1 frac{1}{2} = ( - frac{17}{4} + frac{27}{5} ) - 0.39 + 1 frac{1}{2} = frac{ - 85 + 108}{20} - 0.39 + 1 frac{1}{2} = frac{23}{20} - 0.39 + frac{ 3}{2} = frac{115 - 39}{100} + frac{3}{2} = frac{76}{100} + frac{3}{2} = frac{19}{25} + frac{3}{2} = frac{38 + 75}{50} = frac{113}{50} = 2 frac{13}{50} = 2 frac{26}{100} = 2.26$