It is easier to use mental math if you think about the problem as 97-86.
1.1
Practice makes perfect
Sometimes, subtractingdecimals can be intimidating. However, let's look at this number as if it was not a decimal value. If we think about the numbers as 97 and 86 instead, we can do the mental math.
97-86=11
As long as we keep track of the number of decimal places, we can always perform mental math in this way.
&9.7_(1 decimal)-8.6_(1decimal)=1.1_(1 decimal place)
Note that the number of decimal places in the answer depends on the type of operation being performed.
