Integers
When subtracting integers, fractions, and decimals, what is the first step?
Keep the 1st Number
Change the sign to Addition
Opposite of the 2nd Number
(KEEP. CHANGE. OPPOSITE.)
After KEEP. CHANGE. OPPOSITE., the first rule to fractions is?
Find a common denominator
What must I do the decimals after KEEP. CHANGE. OPPOSITE.?
Line up the Decimals and Use Adding Integer Rules
-4 - (-7)
+3
What is the common number between the two denominators?
4 and 8
4 * 2 = 8
Answer: 8
Will I add or subtract these two decimals and why?
-0.634 - (-8.349)
Subtract. After doing KCO, we get
-0.634 + 8.349
These are different signs, so we subtract.
9 - (-11)
+20
What is the common number between the two denominators?
3 and 5
3 * 5 = 15
Answer: 15
9.45 - (-1.35)
+10.80
7 - 15
-8
-3/4 - (-7/8)
1/8
-4.32 - (3.47)
-7.79
-6 + (-7) - (-15)
+2
3 1/2 - (-2 1/4)
5 3/4
8.23 - 10.34
-2.11