Question

va rog sa rezolvați. aflați termenul necunoscut :a+12,53=21,75 . b-9,99=10,02. 61,4-c=28,9. Calculati :11,2:2-1,3×2 =. 15,5:5+9,36:9=..
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Answer 1

Răspuns:

$a + 12.53 = 21.75 \\ a = 21.75 - 12.53 \\ a = 9.22 = \frac{461}{50} = 9 \times \frac{11}{50}$

$b - 9.99 = 10.02 \\ b = 10.02 + 9.99 \\ b = 20.01 = \frac{2001}{100} = 20 \times \frac{1}{100}$

$61.4 - c = 28.9 \\ - c = 28.9 - 61.4 \\ - c = - 32.5 \\ c = 32.5 = \frac{65}{2} = 32 \times \frac{1}{2}$

$11.2 \div 2 - 1.3 \times 2 = 5.6 - 2.6 = 3$

$11.2 \div 2 - 1.3 \times 2 = 5.6 - 2.6 = 3 \\ 15.5 \div 5 + 9.36 \div 9 = 3.1 + 1.04 = 4.14 = \frac{207}{50} = 4 \times \frac{7}{50}$