Question

(A)5/6 - 1/4 + 3/8 =

(B)9/7 - 3/10 + 15/8 =

(C)1/8 + 7/4 - 3/5 +5/6 =​

Answer 1

Explicação passo-a-passo:

(A)

6,4,8/2

3,2,4/2

3,1,2/2

3,1,1/3

1,1,1/____// mmc(6,4,8)=2³.3=24

5/6 - 1/4 + 3/8 =(20-6+9)/24

5/6-1/4+3/8=(14+9)/24

5/6-1/4+3/8= 23/24 <=

(B)

7,10,8/2

7,5,4/2

7,5,2/2

7,5,1/7

1,5,1/5

1,1,1/____// mmc(7,10,8)=2³.7.5= 280

9/7 - 3/10 + 15/8 =(360-84+525)/280

9/7-3/10+15/8=(276+525)/280

9/7-3/10+15/8= 801/280 <=

(C)

8,4,5,6/2

4,2,5,3/2

2,1,5,3/2

1,1,5,3/3

1,1,5,1/5

1,1,1,1/___//mmc(8,4,5,6)=2³.3.5=120

1/8+7/4-3/5+5/6=(15+210-72+100)/120

1/8+7/4-3/5+5/6=(225+28)/120

1/8+7/4-3/5+5/6= 253/120 <=