Question

a) 1/2 x 1/4 + 1/2 x 3/4

b) 4/5 x 1/2 - 1/2 x 1/4

Answer 1

a.1/8+3/8=1/2

b.2/5-1/8=11/40

Answer 2

a, `1/2`

b, `11/40`

Answer 3

1/2

11/40

Answer 4

1/2

11/40

Answer 5

a)    1/2 x 1/4 + 1/2 x ¾

=1/8+3/8=4/8=1/2

b) 4/5 x 1/2 - 1/2 x ¼

4/10-1/8=11/40

Answer 6

a, \(\dfrac{1}{2}\times\left(\dfrac{1}{4}+\dfrac{3}{4}\right)=\dfrac{1}{2}\times\dfrac{4}{4}=\dfrac{1}{2}\times1=\dfrac{1}{2}\)

b, \(\dfrac{1}{2}\times\left(\dfrac{4}{5}-\dfrac{1}{4}\right)=\dfrac{1}{2}\times\left(\dfrac{16}{20}-\dfrac{5}{20}\right)=\dfrac{1}{2}\times\dfrac{11}{20}=\dfrac{11}{40}\)

Answer 7

`a)1/2xx1/4+1/2xx3/4=1/2xx(1/4+3/4)=1/2xx4/4=1/2`

`b)4/5xx1/2-1/2xx1/4=1/2xx(4/5-1/4)=1/2xx(16/20-5/20)=1/2xx11/20=11/40`

Answer 8

a.=1/2

b.=11/40

Answer 9

a) 1/2 x 1/4 + 1/2 x 3/4

= \(\dfrac{1}{2}\)x ( \(\dfrac{1}{4}+\dfrac{3}{4}\))

= \(\dfrac{1}{2}\)x 1

= \(\dfrac{1}{2}\)

b) 4/5 x 1/2 - 1/2 x 1/4

= \(\dfrac{1}{2}\)x (\(\dfrac{4}{5}-\dfrac{1}{4}\)) 

= \(\dfrac{1}{2}\)x \(\dfrac{11}{20}\)

= \(\dfrac{11}{40}\)

Answer 10

a) \(\dfrac{1}{2}\times\dfrac{1}{4}+\dfrac{1}{2}\times\dfrac{3}{4}=\dfrac{1}{2}\times\left(\dfrac{1}{4}+\dfrac{3}{4}\right)=\dfrac{1}{2}\times1=\dfrac{1}{2}\)

b) \(\dfrac{4}{5}\times\dfrac{1}{2}-\dfrac{1}{2}\times\dfrac{1}{4}=\left(\dfrac{4}{5}-\dfrac{1}{4}\right)\times\dfrac{1}{2}=\dfrac{11}{20}\times\dfrac{1}{2}=\dfrac{11}{40}\)

Answer 11

1/8 + 3/8 = 1/2

2/5 - 1/8 = 11/40