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mejvis
@mejvis
August 2022
2
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решите уравнения:
1) 6,89 + 5,37 + 3,11 + 4,63
2) 36 * 2,7 * 5/8
3)0,3 * 0,783 + 0,3 * 0,217
4)3,4 * 5с
5) 7,5а * 2х
6) 6х - 13х
7) 5b + 7b - 8b
8) 9a - 1a - 1,2y + 0,5y
9) 2a + (3a - 8a)
заранее спасибо
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Answers & Comments
oksik1970
Это не уравнения.
1) 6,89 + 5,37 + 3,11 + 4,63 = (6,89 + 3,11) + (5,37 + 4,63) = 10 + 10 = 20
2)
3) 0,3 * 0,783 + 0,3 * 0,217 = 0,3 × (0,783 + 0,217) = 0,3 × 1 = 0,3
4)
5) 7,5а * 2х = 15ах
6) 6х - 13х = -7х
7) 5b + 7b - 8b = 5b - b = 4b
8) 9a - 1a - 1,2y + 0,5y = 8a - 0,7y
9) 2a + (3a - 8a) = 2a - 5a = -3a
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Thanks 0
JansayaIvanowna
1)(6,89+3,11)+(5,37+4,63)=10+10=20
2)36•2,7•5/8=97,2•0,625=60,75
3)0,3•(0,783+0,217)=0,3•1=0,3
4)3,4•5c=17c
5)7,5a•2x=15ax
6)6x-13x=-7x
7)5b+7b-8b=12b-8b=4b
8)9a-1a-1,2y+0,5y=8a-0,7y
9)2a+(3a-8a)=2a-5a=-3a
0 votes
Thanks 0
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Answers & Comments
1) 6,89 + 5,37 + 3,11 + 4,63 = (6,89 + 3,11) + (5,37 + 4,63) = 10 + 10 = 20
2)
3) 0,3 * 0,783 + 0,3 * 0,217 = 0,3 × (0,783 + 0,217) = 0,3 × 1 = 0,3
4)
5) 7,5а * 2х = 15ах
6) 6х - 13х = -7х
7) 5b + 7b - 8b = 5b - b = 4b
8) 9a - 1a - 1,2y + 0,5y = 8a - 0,7y
9) 2a + (3a - 8a) = 2a - 5a = -3a
2)36•2,7•5/8=97,2•0,625=60,75
3)0,3•(0,783+0,217)=0,3•1=0,3
4)3,4•5c=17c
5)7,5a•2x=15ax
6)6x-13x=-7x
7)5b+7b-8b=12b-8b=4b
8)9a-1a-1,2y+0,5y=8a-0,7y
9)2a+(3a-8a)=2a-5a=-3a