Add −26.109+4.08
-21.029
Arthur is playing in his room, which is 24.3 feet above ground. He then descends 39.9 feet to the basement, where is uncle is working in his woodshop. If ground level is 0 feet, which number best describes the location of the basement woodshop?
The basement woodshop is located 15.6 feet below ground level.
To add -26.109 and 4.08, line up the decimal points:
-26.109
+ 4.080
_________
Now, you can start adding from right to left.
Add the numbers in the thousandths place: 9 + 0 = 9.
Add the numbers in the hundredths place: 0 + 8 = 8.
Add the numbers in the tenths place: 1 + 0 = 1.
Add the numbers in the ones place: -2 + 4 = 2.
The sum of -26.109 and 4.08 is -21.029.