To find 10 more than a number, add 1 to the digit at the tens place.
To find 10 less than a number, subtract 1 from the digit at the tens place.
For example: Let's find 10 less than the number 47.
This number can be written in the place value table as:
Tens | Ones |
4 | 7 |
Notice that there are four tens in the number 47.
Tens | Ones |
4
|
7
|
To find 10 less than 47, subtract 1 from the digit at its tens place.
4 – 1 = 3
Tens | Ones |
3 | 7 |
So, 10 less than the number 47 is 37.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21,27,23
21 is the smallest number.