Question

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

mmc= 4

4,2===2

2,1====2

1,1

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

mmc = 15

5,3===3

5,1====5

1,1

c) 10/5-2/20= 40/20-2/20=38/20

mmc=20

5,20===2

5,10====2

5,5=====5

1,1

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

mmc=20

5,4===2

5,2===2

5,1====5

1,1

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

mmc=2

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

mmc=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

mmc= 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

mmc=12

3,6,4===2

3,3,2===2

3,3,1====3

1,1,1

Espero ter ajudado