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Valkiria1711
@Valkiria1711
August 2022
2
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срочно!!!15 баллов.математика
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svetazuna
1.
- 5 1/3 + (-2) = - 5 1/3 - 2 = - 7 1/3,
2.
(-32) + 7 = - 25,
-5/7 + 2/3 = -15/21 + 14/21 = -1/21,
3.
-7 - (-1 2/5) = -7 + 1 2/5 = -6 5/5 + 1 2/5 = - 5 3/5,
4.
х - (-1) - 3 = -4,
х + 1 - 3 = -4,
х = -4 - 1 + 3,
х = -5 + 3,
х = -2
2 votes
Thanks 1
Valkiria1711
спасибо))
svetazuna
:))
ОлькаЛелька90
В первом задании - сумма чисел -2 и -5
ОлькаЛелька90
1.
-2 + (-5 1/3) = -7 1/3
2.
а) = 7-32 = -25
б) = 2/3 - 5/7 = (14 - 15) / 21 = - 1/21
3.
= -7 + 1,4 = -5,6
4.
= - 3 + 5 - 6 - 5,5 = - 9,5
5.
х + 1 - 3 = -4
х = -4 -1 +3
х = -2
проверка
-2 +1 -3 = -4
1 votes
Thanks 1
Valkiria1711
спасибо)
svetazuna
и сколько по вашему от -5 до -2 будет? наверное все же 3, а не 7
Valkiria1711
я тоже так думаю)
ОлькаЛелька90
сумма чисел!!! -5 и -2 будет -7
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Answers & Comments
- 5 1/3 + (-2) = - 5 1/3 - 2 = - 7 1/3,
2.
(-32) + 7 = - 25,
-5/7 + 2/3 = -15/21 + 14/21 = -1/21,
3.
-7 - (-1 2/5) = -7 + 1 2/5 = -6 5/5 + 1 2/5 = - 5 3/5,
4.
х - (-1) - 3 = -4,
х + 1 - 3 = -4,
х = -4 - 1 + 3,
х = -5 + 3,
х = -2
-2 + (-5 1/3) = -7 1/3
2.
а) = 7-32 = -25
б) = 2/3 - 5/7 = (14 - 15) / 21 = - 1/21
3.
= -7 + 1,4 = -5,6
4.
= - 3 + 5 - 6 - 5,5 = - 9,5
5.
х + 1 - 3 = -4
х = -4 -1 +3
х = -2
проверка
-2 +1 -3 = -4