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Выполните действия:
1) 2/47 * 9,4 + 5,6
2) 2,1 - 6,2 * 3/31
3) 5,8 : 9 2/3 + 8 2/3

1) 40 + 6 1/9 : 2 1/27 - 23 10/11
2) 53,5 - 14 1/6 * 1 1/17 + 8 2/3

Answers & Comments

IrkaShevko

Verified answer

Ответ:

Пошаговое объяснение:

$1) \dfrac{2}{47} *9,4+5,6=6\\\\1.\dfrac{2}{47} *\dfrac{94}{10} =0,4\\\\2.0,4+5,6=6$

$2) 2,1 - 6,2 * \dfrac{3}{31} =1,5\\\\1.\dfrac{62}{10} * \dfrac{3}{31} =0,6\\\\2.2,1-0,6=1,5$

$3) 5,8 : 9 \frac{2}{3} + 8 \frac{2}{3}=9\frac{4}{15}\\\\1.\dfrac{58}{10} : \dfrac{29}{3}=\dfrac{58}{10} * \dfrac{3}{29}=0,6\\\\2.\dfrac{6}{10} +8 \frac{2}{3}=\dfrac{18}{30} +8 \frac{20}{30}=8 \frac{38}{30}=9 \frac{8}{30}=9\frac{4}{15}$

$1) 40 + 6 \frac{1}{9} : 2 \frac{1}{27} - 23 \frac{10}{11}=19 \frac{1}{11}\\\\1.\frac{55}{9} : \frac{55}{27}=\frac{55}{9} * \frac{27}{55}=3\\\\2.40+3 = 43\\\\3.43-23 \frac{10}{11}=19 \frac{1}{11}$

$2) 53,5 - 14 \frac{1}{6} * 1 \frac{1}{17} + 8 \frac{2}{3}=61\frac{17}{30} \\\\1.\frac{85}{6} * \frac{18}{17}=0,6\\\\2.53,5-0,6=52,9\\\\3.52\frac{9}{10} +8 \frac{2}{3}=60\frac{27+20}{30} =60\frac{47}{30} =61\frac{17}{30}$

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