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turdchan
@turdchan
September 2021
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30 БАЛОВ
1.НАЙДИТЕ ЗНАЧЕНИЕ ВЫРАЖЕНИЯ
-2 1/4*(8 2/9-(-4,5):9/14)-5 3/8
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ndusha
Verified answer
-2 1/4*(8 2/9-(-4,5):9/14)-5 3/8=
-39 5/8
по действиям
в скобках
(-4,5):9/14=-4 5/10:9/14=-45/10*14/9=-9/2*14/9=-1/2*14/1=-14/2=-7
8 2/9-(-7)=8 2/9+7=15 2/9
-2 1/4*15 2/9=-9/4*137/9=-137/4=-34 1/4
-34 1/4-5 3/8=-34 2/8-5 3/8=-39 5/8
11 votes
Thanks 10
svetazuna
-2 1/4 * (8 2/9 - (-4,5) : 9/14) - 5 3/8 = -39 5/8,
1) -4,5 : 9/14 = - 45/10 : 9/14 = - 45/10 * 14/9 = -7,
2) 8 2/9 - (-7) = 8 2/9 + 7 = 15 2/9,
3) - 2 1/4 * 15 2/9 = - 9/4 * 137/9 = - 137/4 = -34 1/4,
4) -34 1/4 - 5 3/8 = - 137/4 - 43/8 = -274/8 - 43/8 = -317/8 = -39 5/8
6 votes
Thanks 7
svetazuna
спасибо ))
turdchan
пожалуйста))))
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Answers & Comments
Verified answer
-2 1/4*(8 2/9-(-4,5):9/14)-5 3/8=-39 5/8по действиям
в скобках
(-4,5):9/14=-4 5/10:9/14=-45/10*14/9=-9/2*14/9=-1/2*14/1=-14/2=-7
8 2/9-(-7)=8 2/9+7=15 2/9
-2 1/4*15 2/9=-9/4*137/9=-137/4=-34 1/4
-34 1/4-5 3/8=-34 2/8-5 3/8=-39 5/8
1) -4,5 : 9/14 = - 45/10 : 9/14 = - 45/10 * 14/9 = -7,
2) 8 2/9 - (-7) = 8 2/9 + 7 = 15 2/9,
3) - 2 1/4 * 15 2/9 = - 9/4 * 137/9 = - 137/4 = -34 1/4,
4) -34 1/4 - 5 3/8 = - 137/4 - 43/8 = -274/8 - 43/8 = -317/8 = -39 5/8