Mr.Harris has some money in his wallet. He pays the babysitter $12 an hour for 4 hours of babysitting. His wife gives him $10 and he puts the money in his wallet. By how much does the amount in his wallet change?
Well this is how much money he has in his wallet I'm assuming is 12 X 4 is 48 then 48-10 is 38, he has $38 in his wallet
We start with -$12 an hour for 4 hours so we multiply:
-$12 4 = -$48
then his wife gives him $10:
-$48 + $10 = -$38
since we are looking for change and not loss or gain the answer is $38
The whole problem can be written out as (-124)+10