Integers
-12 + 19
7
-5/9 + -2/9
-7/9
-26.3 +.26.3
0
2.5 + -3/4
1.75 or 1 ¾ or 7/4
What are the two rules for adding and subtracting Integers? for example
4 + -5
-7 + -8
Same signs add, different signs subtract
-15 + -6
-21
11 8/9 – 6 2/9
5 2/3 or 17/3
-15.8 – 15.8
-31.6
-4.85 – 7 3/5
-12.45 or -12 9/20 or -249/20
When adding and subtracting decimals you must make sure to . . .
line up the decimals
11 - (-4)
15
6 1/3 + (-4 5/6)
1 1/2 or 3/2
3.6 + (-1.7)
1.9
19/20 – 0.50
= 9/20 or 0.45
How can someone subtract or take away a negative, just like in this expression. -9 - (-4)
by adding the opposite or +4
-2 - (-10)
8
8 3/4 + -10 2/3
-1 11/12 or -33/12
33.07 + -17.54
15.53
-5.5 + 5 ½ - 6
-6
When there are mixed numbers, what can you do to ensure you will use the correct numerators, just like in this expression:
2 1/3 - 5 2/5
Turn mixed number into an improper fraction
5 + (-7) - (-8)
6
-12 + ¾ - 3/5
-11 7/20 or -227/20
-4.4 – (9.6) + 4.4
9.6
7.34 – 5 ¾ - 10
-8.41 or -8 41/100 or -841/100
When working with fractions the answer must always be
Simplified