Question

(13 целых 110 -12.05):7.2/0.48*11.7+(1.25*0.4+18.54 :1.8):(0.43+17.57)

Answer 1

1)
$13 frac{1}{10} - 12.05= 1 frac{10 - 5}{100} = 1 frac{5}{100} = 1.05$
2)
$1.05 div 7.2 = frac{105 times 10}{100 times 72} = frac{105}{2 times 72} = frac{21}{2 times 72} = frac{7}{2 times 24} = frac{7}{48}$
3)

$0.48 times 11.7 = frac{48 times 117}{100 times 10} = frac{48 times 117}{1000} = frac{6 times 117}{125} = frac{702}{125} = 5 frac{77}{125} = 5.616$
4)
$1.25 times 0.4 = frac{125 times 4}{100 times 10} = frac{500}{1000} = frac{1}{2} = 0.5$
5)
$18.54 div 1.8 = frac{1854 times 10}{100 times 18} = frac{103}{10} = 10.3$
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