Вычислите: 1) -6 2/3-8,75-2 5/12 2)-3 7/15+0,4-6 1/3 3)-1,5-3 4/5-8 3/20 4)-2 5/8-9,25-3/4 Заранее СПАСИБО!. Created by Danik558. matematika-ru

4 Заранее СПАСИБО!...

Danik558 @Danik558

November 2021 1 19 Report

Вычислите: 1) -6 2/3-8,75-2 5/12 2)-3 7/15+0,4-6 1/3 3)-1,5-3 4/5-8 3/20 4)-2 5/8-9,25-3/4
Заранее СПАСИБО!

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GlebGor1998

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1) - 6 2/3 - 8,75 = - 20/3 - 8 3/4 = - 20/3 - 35/4 = - (80/12 + 105/12) = - 185/12 = - 15 5/12
2) - 3 7/15 + 0,4 - 6 1/3 = - 3 7/15 + 2/5 - 6 1/3 = - 52/15 + 2/5 - 19/3 = - 52/15 + 6/15 - 95/15 = - 1/15 * ( 52 - 6 + 95) = - 1/15 * 151 = - 151/15 = - 10 1/15
3)-1,5 - 3 4/5 - 8 3/20 = - 1 1/2 - 3 4/5 - 8 3/20 = - 3/2 - 19/5 - 163/20 = - 30/20 - 76/20 - 163/20 = - 1/20 * (30 + 76 + 163) = - 1/20 * 269 = - 269/20 = -13 9/20
4) - 2 5/8 - 9,25 - 3/4 = - 2,625 - 9,25 - 0,75 = - (2,625 + 9,25 + 0,75) = - 12,625 = 12 5/8

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