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Subtraction Patterns Over Increasing Place Values (Within 1000)

Consider the subtraction pattern:

7 – 5 = _____

70 – 50 = _____

700 – 500 = _____

To complete this pattern, we find the first missing number.

7 ones – 5 ones = 2 ones

7 – 5 = 2

 
Now use this result to complete the pattern:

 

7 tens – 5 tens = 2 tens

70 – 50 = 20

 

7 hundreds – 5 hundreds = 2 hundreds
700 – 500 = 200
ds

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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

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.