The Basics of math

Practice adding & subtracting rational numbers: fractions, decimals & integers!

Organize these numbers into Integers and Rational categories. *hint: integers are whole numbers. Rational: fraction or simple decimal**tip: simplify when necessary Integers 3 49 -2 5 1,498 Rational .5 -1 5 9.1 -0.25 Adding Subtracting Rational Numbers When you add or subtract rational numbers, you use the same rules that apply to adding or subtracting integers.When Adding:Rule 1: When the numbers have the same sign, add the absolute values and give the sum the same sign as the addends.Rule 2: When the numbers have different signs, subtract the absolute values and give the sum the sign of the number with the greater absolute value.When Subtracting:Rule 3: When you subtract a number, add its opposite (or additive inverse). Be sure to use either Rule 1 or Rule 2 when adding to find the sum.Example 1: 2.51 + (-0.36) Example 2: -7.2 - (-9.1)2.51 *notice: different signs -7.2 *notice subtracting- 0.36 =>use Rule 2 + 9.1 =>use Rule 32.15 1.9 9.1 > 7.2 so use a sign Loading Activity... A few more practice problems :) (click here)