Question

Do the addition or subtraction scale and illustrate the calculation with a simple model in picture or diagram form.
5\6 + 1\12=?

5\8 - 1\2=?

2 1\3 + 1 3\4=?

1 2\5 - 2\3=?

Answer 1

$${5 \over 6}+{1 \over 12}={11 \over 12}$$

$${5 \over 8}-{1 \over 2}={1 \over 8}$$

$$2{1\over 3}+1{3\over 4}=4{1\over12}$$

$$1{2\over 5}-{2\over 3}={11\over15}$$