Integers
Negative
Positive
* Zero is neither positive or negative
Comparing Integers
The integer with more number of digits is always greater than
the integer with less number of digits.
Examples:Use <, >, or =
-40 < 50
-5 < 0
Adding & Subtracting Integers
Same signs
Get sum of both and keep the same sign
Different signs
Get the difference between them and keep the sign of the
largest
Examples:-10 + 4 = -6
2 – 7 = -5
-6 + 6= 0
4 + - 8 = -4
Multiplying & Dividing Integers
Same signs
Positive answer
Different signs
Negative answer
Examples:8 × - 4 = -32
9 × - 5 = -45
-7 × 8 = -56
-5 × - 4 = 20
20 ÷ - 2 = -10
-35 ÷ 1 = - 35
-48 ÷ 6 = -8
-50 ÷ -10 = -5
Temperature
Go to the right
Increase
Rise
Rose
Hotter
Warmer
Higher
More
Go to the left
Decrease
Fall
Fell
Drops
Cooler
Colder
Lower
Less
Square Numbers
Square Roots
√1=1
√4=2
√9=3
√16=4
√25=5
√36=6
√49=7
√64=8
√81=9
√100=10
Cube Numbers
Cube Roots
√1= 1
√8= 2
√27= 3
√64= 4
√125= 5
√216= 6
√343= 7
√512= 8
√729= 9
√1000= 10
Order of operations
Examples:7 × (13 × 9 + 5) + 2= 856
(15 + 38 – 3) ÷ ( 6 + 4)= 25
Divisibility rules
Or divide
100: ends at least with two zeros
1000: ends at least with three zeros
25: ends in 00, 25, 50, 75
50: ends in 00 or 50
Prime Numbers