calcular o valor das exprecoes . a. 2/5+1/2- 1/3 . b . 3/4×5/6+1/2 . c. 2/3+1/4×3 . d. 3/4 : 1/2 - 2/3 . e. 3/5 + 1/5 : 1/10 . f . 2 1/2 + 3/2 × 1/2 . por favor me ajuda a para hj .
Respostas
respondido por:
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a. 2/5+1/2- 1/3 = mmc 30
6.2/30 + 15.1/30 - 10.1/30 =
12 + 15 - 10 / 30 =
27 - 10 / 30 =
17 / 30
b . 3/4×5/6+1/2 =
15/24 + 1/2 = mmc 24
1.15/24 + 12.1/24 =
15 + 12 / 24 =
27/24 = simplificando por 3
9/8
c. 2/3+1/4×3 =
2/3 + 3/4 = mmc 12
4.2/12 + 3.3/12 =
8 + 9 /12 =
17/12
d. 3/4 : 1/2 - 2/3 =
3/4 x 2/1 - 2/3 =
6/4 - 2/3 = mmc 12
3.6/12 - 4.2/12 =
18 - 8/12 =
10/12 = simplificando por 2
5/6
e. 3/5 + 1/5 : 1/10 =
3/5 + 1/5 x 10 =
3/5 + 1/50 = mmc 50
10.3/50 + 1.1/50 =
30 + 1/50 =
31/50
f . 2 1/2 + 3/2 × 1/2 =
2,5 + 3/4 = mmc 4
4.2,5/4 + 1.3/4 =
10 + 3/4 =
13/4
6.2/30 + 15.1/30 - 10.1/30 =
12 + 15 - 10 / 30 =
27 - 10 / 30 =
17 / 30
b . 3/4×5/6+1/2 =
15/24 + 1/2 = mmc 24
1.15/24 + 12.1/24 =
15 + 12 / 24 =
27/24 = simplificando por 3
9/8
c. 2/3+1/4×3 =
2/3 + 3/4 = mmc 12
4.2/12 + 3.3/12 =
8 + 9 /12 =
17/12
d. 3/4 : 1/2 - 2/3 =
3/4 x 2/1 - 2/3 =
6/4 - 2/3 = mmc 12
3.6/12 - 4.2/12 =
18 - 8/12 =
10/12 = simplificando por 2
5/6
e. 3/5 + 1/5 : 1/10 =
3/5 + 1/5 x 10 =
3/5 + 1/50 = mmc 50
10.3/50 + 1.1/50 =
30 + 1/50 =
31/50
f . 2 1/2 + 3/2 × 1/2 =
2,5 + 3/4 = mmc 4
4.2,5/4 + 1.3/4 =
10 + 3/4 =
13/4
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