Page 57 - Start Up Mathematics_1

Little Genius!

Look at the example and solve.
a b g d c t n i s

1 2 3 4 5 6 8 9 0

Example: i n = 1 i t = a s = i s =
(9 – 8)

c a b = 2 d a b = g a s = t a b =
(5 – 1 – 2)

Subtraction on a Number Line

To subtract on a number line, we move backwards.

Let’s take an example, 8 – 5 = ?
Start from 8 on the number line. To subtract 5, move 5 steps backward from 8.

You will reach 3 which is the answer.

So, 8 – 5 = 3.

0 1 2 3 4 5 6 7 8 9

Look at the given examples.

1. 7 – 1 = ?

0 1 2 3 4 5 6 7 8 9

Starting from 7, we count back 1. Remember
We get the answer 6. When we subtract 1 from a

So, 7 – 1 = 6. number, the answer is the
number just before it.

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