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Boss367
@Boss367
July 2022
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69/70·7/23-4/25:4/25+3/5·25/36. / дробь
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ккквнаоочвоа
По действиям
1.69/70 * 7/23 = 69*7/70*23 = 483/1610 = 3*161/10*161 = 3/10
= 0.3
2.
4/25
÷
4/25
=
4/25
×
25/4
=
4·25/25·4
=
100/100
= 1
3.
3/5
×
25/36
=
3·25/5·36
=
75/180=
75/180
=
5·15/
12·15
=
5/
12
4.
3/10
-
10/10
=
3 - 10/10
=
-7/10
5.-
7/10
+
5/12
=
5/12
- (-
7/10
) =
5·5/12·5
- -
7·6/10·6
=
25/60
- -
42/60
=
25 - 42/60
=
-17/
60
4 votes
Thanks 3
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Answers & Comments
1.69/70 * 7/23 = 69*7/70*23 = 483/1610 = 3*161/10*161 = 3/10 = 0.3
2.4/25 ÷ 4/25 = 4/25 × 25/4 = 4·25/25·4 = 100/100 = 1
3.3/5 × 25/36 = 3·25/5·36 = 75/180=75/180 = 5·15/12·15 = 5/12
4.3/10 - 10/10 = 3 - 10/10 = -7/10
5.-7/10 + 5/12 = 5/12 - (-7/10) = 5·5/12·5 - -7·6/10·6 = 25/60 - -42/60 = 25 - 42/60 = -17/60