Page 83 - Start Up Mathematics_1

(e) 735 – 459 (f) 910 – 52 (g) 537 – 368

H T O H T O H T O

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Checking Checking Checking

H T O H T O H T O

+ + +

Finding the Missing Digits

Let’s learn how to find the missing digits in a
problem on subtraction. Remember
Always start from ones,
• To find the smaller missing number, subtract then move to tens and
the difference from the bigger number. then hundreds.

• To find the bigger missing number, add the
smaller number to the difference.

Look at the given examples.

Checking

T O T O T O
1. bigger
9 5 number 9 5 5 3 difference

– 4 ? smaller – 4 2 + 4 2 smaller
number
number
5 3 difference 5 3 9 5 bigger
number

Subtract 3 from 5. 2 is the
5 – 3 = 2 missing digit.

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