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thiagoxavier
@thiagoxavier
March 2022
2
34
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o valor da espressão 2/5 + 1/7 : 4/21 - 1/3 é:
a- 23/245
b- 1/15
c- 49/60
d- impossivel
e- zero
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rosanebarranco
2/5 + 1/7 : 4/21 - 1/3
2
+
1
:
4
-
1
5 7 21 3
2
+
1
x
21
-
1
5 7 4 3
2
+
1
x
3
-
1
5 1 4 3
2
+
3
-
1
==>
24+ 45 - 20
5 4 3 60
49
60
1 votes
Thanks 1
3478elc
Verified answer
2/5 + 1/7 : 4/21 - 1/3
2/5 + 1/7 x 21/4 - 1/3
2/5 + 3/4 - 1/3
MMC
5 - 4 - 3 | 2
5 - 2 - 3 | 2
5 - 1 - 3 | 3
5 - 1 - 1 |5
1 - 1 - 1
MMC =2x 2 x 3 x 5
MMC = 60
2/5/12 + 3/4/15 - 1/3/20
24/60 + 45/60 -20/60 =
49/60
0 votes
Thanks 1
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Lista de comentários
2/5 + 1/7 : 4/21 - 1/3
2 + 1 : 4 - 1
5 7 21 3
2 + 1 x 21 - 1
5 7 4 3
2 + 1 x 3 - 1
5 1 4 3
2 + 3 - 1 ==> 24+ 45 - 20
5 4 3 60
49
60
Verified answer
2/5 + 1/7 : 4/21 - 1/32/5 + 1/7 x 21/4 - 1/3
2/5 + 3/4 - 1/3
MMC
5 - 4 - 3 | 2
5 - 2 - 3 | 2
5 - 1 - 3 | 3
5 - 1 - 1 |5
1 - 1 - 1
MMC =2x 2 x 3 x 5
MMC = 60
2/5/12 + 3/4/15 - 1/3/20
24/60 + 45/60 -20/60 =
49/60