Mental math means calculating the given numbers without using anything that can help you solve the problem like paper and pen, calculator, etc.
Now let’s have 81-16
=> 81 -16
=> 65
Now, let’s check if our answer is correct by adding the answer or the difference by the subtrahend.
By the way in subtraction
81 => minuend
16 => subtrahend
65 => difference
=> 65 + 16
=> 81
Our answer is correct. Hope this help.
we have
( 81 − 16 )
One way to use mental math is to add 4 to both 81 and 16
so
81 + 4 = 85 16 + 4 = 20 85 − 20 = 65
therefore
81 − 16 = 65
the answer is
65
To find 81 − 16 using mental math, break down 16 into 10 and 6 . Subtract 10 from 81 to get 71 , then subtract 6 from 71 to get the final answer of 65 .
;