1179326
Mind Map by Meggie Kleveland, updated more than 1 year ago
|
Created by Meggie Kleveland
over 6 years ago
|
|
Description
Operations of Integers
1 Addition
1.1 Same sign
1.1.1 If the signs are the same, add
normally and keep that sign.
1.1.1.1 EXAMPLES:
1.1.1.1.1 5 + 7
= 12
1.1.1.1.1.1 A tip for adding
integers: It's like counting
on a number line. When
you add a positive, you
go to the right. When
you add a negative,
you count to the left.
1.1.1.1.2 -12 + -10
= -22
1.2 Different Sign
1.2.1 If the signs are different, subtract and
take the sign from the bigger number.
1.2.1.1 EXAMPLES:
1.2.1.1.1 -25 + 30
= 5
1.2.1.1.2 4 + -18
= -14
2 Subtraction
2.1 Same Sign
2.1.1 Add the opposite of the second
term then follow the adding rules.
2.1.1.1 EXAMPLES:
2.1.1.1.1 76 - 70
= 6
2.1.1.1.2 -13 - (-5)
= -8
2.2 Different Sign
2.2.1 Add the opposite of the second
term then follow the adding rules.
2.2.1.1 EXAMPLES:
2.2.1.1.1 -16 - (8)
= -24
2.2.1.1.2 20 - (-9)
= 29
3 Multiplication
3.1 Same Sign
3.1.1 If the signs are the same, the
answer is positive.
3.1.1.1 EXAMPLES:
3.1.1.1.1 6 x 4
= 24
3.1.1.1.2 -7 x -8
= -56
3.2 Different Sign
3.2.1 If the signs are different, the
answer is negative.
3.2.1.1 EXAMPLES:
3.2.1.1.1 -16 x 2
= -32
3.2.1.1.2 3 x -11
= -33
4 Division
4.1 Same Sign
4.1.1 If the signs are the same,the
answer is positive.
4.1.1.1 EXAMPLES:
4.1.1.1.1 35 ÷ 5
= 7
4.1.1.1.2 -28 ÷ -2
= 14
4.2 Different Sign
4.2.1 If the signs are different, the
answer is negative.
4.2.1.1 EXAMPLES:
4.2.1.1.1 45 ÷ -15
= -3
4.2.1.1.2 -27 ÷ 3
= -9