Operations of Integers

Meggie Kleveland
Mind Map by Meggie Kleveland, updated more than 1 year ago
Meggie Kleveland
Created by Meggie Kleveland over 6 years ago
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Description

Mind Map on Operations of Integers, created by Meggie Kleveland on 08/22/2014.

Resource summary

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
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