Brian needs $45 to buy his mother a gift. He already has $27 from his savings, and his father gives him $7. By how much is he still short?.

Subtraction is a mathematical operation that reflects the removal of things from a collection. The amount by which Brian is short is $11.

What is subtraction?

Subtraction is a mathematical operation that reflects the removal of things from a collection. The negative symbol represents subtraction.

The cost of the gift is $45. Brian has $27, also his father gave him $7, therefore, the total money he has is,

$27+$7 = $34

The amount Brian is short of will be the difference between $45 and $34, therefore,

The amount Brian is short off = $45-$34 = $11

Hence, the amount by which Brian is short is $11.

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