Question

Como resolvo essas frações??

a) 1/5 + 3/2 + 2/3 + 3/4
b) 8/9 - 1/3 + 12/5 - 3/4

Answer 1

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

5,2,3,4÷2
5,1,3,2 ÷2
5,1,3,1 ÷3
5,1,1,1 ÷5
1,1,1,1

2×2=4
3×4=12
12×5=60

12/60+90/60+40/60+45/60=187/60

b)8/9-1/3+12/5-3/4=

9,3,5,4÷2
9,3,5,2÷2
9,3,5,1 ÷3
3,1,5,1 ÷3
1,1,5,1 ÷5
1,1,1,1

2×2=4
4×3=12
12×3=36
36×5=180

160/180-60/180+232/180-45/180=287/180

espero ter ajudado