Question

Complete the addition-subtraction box.

Answer 1

`1/2 + 1/3`

= `[(1 xx 3) + (1 xx 2)]/6`

= `(3 + 2)/6`

= `5/6`

`1/3 + 1/4`

= `[(1 × 4) + (1 xx 3)]/12`

= `(4 + 3)/12`

= `7/12`

`1/2 - 1/3`

= `[(1 xx 3) – (1 xx 2)]/6`

= `(3 - 2)/6`

= `1/6`

`1/3 - 1/4`

= `[(1 xx 4) – (1 xx 3)]/12`

= `(4 - 3)/12`

= `1/12`

`1/6 + 1/12`

= `[(1 xx 2) + 1]/12`

= `(2 + 1)/12`

= `3/12`

= `1/4`

Hence, the complete given box is