Operations of Integers

Description

Mind Map on Operations of Integers, created by Meggie Kleveland on 22/08/2014.
Meggie Kleveland
Mind Map by Meggie Kleveland, updated more than 1 year ago
Meggie Kleveland
Created by Meggie Kleveland almost 10 years ago
211
6

Resource summary

Operations of Integers
  1. Addition
    1. Same sign
      1. If the signs are the same, add normally and keep that sign.
        1. EXAMPLES:
          1. 5 + 7 = 12
            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.
            2. -12 + -10 = -22
        2. Different Sign
          1. If the signs are different, subtract and take the sign from the bigger number.
            1. EXAMPLES:
              1. -25 + 30 = 5
                1. 4 + -18 = -14
          2. Subtraction
            1. Same Sign
              1. Add the opposite of the second term then follow the adding rules.
                1. EXAMPLES:
                  1. 76 - 70 = 6
                    1. -13 - (-5) = -8
                2. Different Sign
                  1. Add the opposite of the second term then follow the adding rules.
                    1. EXAMPLES:
                      1. -16 - (8) = -24
                        1. 20 - (-9) = 29
                  2. Multiplication
                    1. Same Sign
                      1. If the signs are the same, the answer is positive.
                        1. EXAMPLES:
                          1. 6 x 4 = 24
                            1. -7 x -8 = -56
                        2. Different Sign
                          1. If the signs are different, the answer is negative.
                            1. EXAMPLES:
                              1. -16 x 2 = -32
                                1. 3 x -11 = -33
                          2. Division
                            1. Same Sign
                              1. If the signs are the same,the answer is positive.
                                1. EXAMPLES:
                                  1. 35 ÷ 5 = 7
                                    1. -28 ÷ -2 = 14
                                2. Different Sign
                                  1. If the signs are different, the answer is negative.
                                    1. EXAMPLES:
                                      1. 45 ÷ -15 = -3
                                        1. -27 ÷ 3 = -9
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