Page 101 - Math Skill - 1

Addition and Subtraction up to 99 99

Subtraction Using an Abacus

Subtract 14 from 35.

Draw beads on the abacus as per the bigger number. Cross out the beads

as per the smaller number. Count the remaining beads.

Example:

T O

3 5 3 tens 5 ones

– 1 4 – 1 ten 4 ones

T O 2 tens 1 one = 21

Draw the beads and subtract the following.

Subtract 24 from 36.

T O

3 6 3 tens 6 ones

– 2 4 – 2 tens 4 ones

T O ten ones =

Subtract 33 from 56.

T O

5 6 5 tens 6 ones

– 3 3 – 3 tens 3 ones

tens ones =
T O