Question

Efetue as operações :
a) 3/4 + 1/2 = b) 4/5 + 1/3= c) 10/5 - 2/10= d) 3/5 - 1/4= e) 7/2 - 3/1=
f)1/3 + 5/6 + 3/4 =
g) 4/5 - 1/2 +3/4 = h) 2/3 + 5/6 - 1/4=​

Answer 1

Explicação passo-a-passo:

a) mmc 4,2=4

4,2===2

2, 2===2

1, 1

3/4+1/2=3/4+2/4=5/4

b) 4/5+1/3= 12/15+5/15=17/15

5,3===3

5,1====5

1,1

c) 10/5-2/10= 20/10-2/10=18/10

5,10===2

5,5===5

1,1

d) 3/5-1/4=12/20-5/20=7/20

5,4===2

5,2===2

5,1====5

1,1

e) 7/2-3/1=7/2-6/2=1/2

f) 1/3+5/6+3/4= 4/12+10/12+9/12=23/12

3,6,4===2

3,3,2===2

3,3,1====3

1,1,1

g) 4/5-1/2+3/4= 16/20-10/20+15/20=6/20+15/20=21/20

5,2,4===2

5,1,2====2

5,1,1=====5

1,1 1

h) 2/3+5/6-1/4=8/12+10/12-3/12=18/12-3/12=15/12

3,6,4===2

3,3,2===2

3,3,1====3

1,1,1

Espero ter ajudado