Question

4/7+ 2/7=
8/5- 3/5=
3/10+ 1/4=
4/5-2/3=
1 3/10- 8/9=
3/25+2/5=
3/4+4/5-3/10=
5/8-3/8-1/8=


me ajudem e urgenteee!!!

Answer 1

a) 4/7+2/7=6/7

b)8/5-3/5=5/5

c)4/5-2/3= 2/15

mmc= 3,5|3

1,5|5

1,1|3x5= 15

$\frac{12 - 10}{15} = \frac{2}{15}$

d)13/10-8/9=37/90

mmc= 9,10|2

9,5|3

3,5|3

1,5|5

1,1| 2x3x3x5=90

$\frac{177 - 80}{90} = \frac{37}{90}$

e)3/25+2/5= 13/25

mmc=5,25|5

1,5|5

1,1|5x5=25

$\frac{3 + 10}{25} = \frac{13}{25}$

f) 3/4+4/5-3/10= 5/4

mmc=4,5,10|2

2,5,5|2

1,5,5|5

1,1,1| 2x2x5=20

$\frac{15 + 16 - 6}{20} = \frac{15 + 10}{20} = \frac{ {25}^{ \div 5} }{ {20}^{ \div 5} } = \frac{5}{4}$

g)5/8-3/8-1/8=1/8