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7th Grade (Integers)
| Question | Answer |
|---|---|
| What are the rule for the ADDITION of integers? | Adding two positive integers results in positive integer Adding two negative integers results in a sum of integers with a negative sign. Adding a positive and a negative integer gives either a positive or negative-sum depending on the value of largest # |
| Positive sign/symbol: | (+) |
| How do we type negative numbers in the calculator? | Type the number in FIRST, then press the top left "+/-" key |
| Examples of ADDITION of integers rules: | The examples of addition of integers are: 10 + 9 = 19 10 + (-9) = 1 -10 + 9 = -1 -10 + (-9) = -19 |
| Examples of SUBTRACTION of integers rules: | The rules to subtract integers are given here with examples: -2 – 3 = -5 2 – (-3) = 5 2 – 3 = -1 3 – 2 = 1 |
| *Two like signs when MULTIPLIED/DIVIDED will result in a positive sign *Two unlike signs when MULTIPLIED/DIVIDED will result in a negative sign. | (+) × OR ÷ (+) = + (-) × OR ÷(-) = + (+) × OR ÷ (-) = – (-) × OR ÷ (+) = – |
| Negative sign/symbol: | (-) |
| Multiplication of Integers example: | 2 x 3 = 6 -2 x -3 = 6 -2 x 3 = -6 |
| Division of Integers example: | -42 ÷ -7= 6 42 ÷ 7= 6 -42 ÷ 7= -6 42 ÷ -7= -6 |
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