Question

determine o valor das expressões:

g) 3/4 + 5/9 : 1/6

h) 1/2 - 1/5 : 2

i) (2/3 - 1/8 . 4/7) : 2/7 . 4/9

j) 3 1/5 + 2 1/9 - 2/3 : 4/9

k) 3 2/5 : (2 1/3+ 1 5/7)

l) (3+2/3).4/11+3:1/2.3/22+5

Answer 1

g)3/4+5/9×6/1=
3/4+30/9=
mmc de 9 e 4 = 36
27/36+120/36=147/36

h)1/2-1/5×1/2=
1/2-1/10=
mmc de 10 e 2= 10
5/10-1/10=4/10=2/5

i)(2/3-4/56)÷8/63=
mmc 56 e 3=168
112/168-4/168=108/168=54/84=27/42=9/14

j)16/5+19/9-2/3×9/4=
16/5+19/9-18/12=
mmc 5, 9, 12=180
576/189+380/180-270/180=686/180

k)17/5÷(7/3+12/7)=
mmc de 3 e 7= 21
17/5÷(49/21+36/21)
17/5÷85/21
17/5×21/85=357/425