Irene has a checking account. on monday she writes a $160 check for groceries. then she deposits $125 into her account. finally, she writes another check for $40. what was the total change in the amount of money in irene’s account on monday? irene's account balance decreased by $ on monday.

First you can see that there are 3 numbers 160,125,and 40 you can add 125 and 40 because they are both checks so then after you add you get $165 in checks do you then subtract $125 which is how much she put in and you get $40. So, she has $-40
In her bank account meaning her back scout was decreased by $40.

Understanding what? lol