Adding Rational Numbers
-7.824 + 23.5=
15.676
38.134 – 31.9=
6.234
20+ (-12) -14
-6
The distance a number is from zero
absolute value
-14 + -8
-22
- 20 - (-4) =
-16
-5 - 9 + 4.897
-9.103
A decimal that contains a finite number of digits (it comes to an end or stops).
A terminating decimal
4 + (-3 1/2)
1/2
-3 3/4 - (-1/2)
-3 1/4
1/5 - (- 1/3) -1
-7/15
When adding or subtracting rational numbers, when do we find the difference between the absolute values of the numbers?
When the numbers have different signs.
–33 + -4.5
-37.5
–3.37 – 9.668
-13.038
-3.45+2 1/2 - (-1.6)
0.65
When adding or subtracting fractions you must have
common denominators
2 1/2 + (-6 2/3)
-4 1/6
5/6 - (-5 1/3)
6 1/6
-1.4 + 2 1/4 - (-3/5)
1 9/20 or 1.45
What type of number has a decimal that neither terminates or repeats?
An irrational number