Question 5(a) :
Complete the addition – subtraction box:
In the first row, we have to add 23 and 43.
23+43=63
Similarly for the second row
13+23=33
In the first column, we have to subtract 23 and 13.
23−13=13
Similarly for the second column
43−23=23
Now, When we add the fractions in the third row:
13+23=33
When we subtract the fractions in the third column we get:
63−33=33
∴ On substituting the values in the box we get: