UNIT 1 NUMERICAL UNDERSTANDING Integers and Positive Rational

UNIT 1: NUMERICAL UNDERSTANDING: Integers and Positive Rational Numbers 1. Integers: whole numbers and their opposites. EXAMPLES: 0, 5, 17 and -334, -15, -5 etc. 2. Perfect Square: the product of squaring a whole number. EXAMPLES: 1, 4, 9, 16, _____. . 3. Rational Numbers: numbers that can written as a ratio. They can be named as fractions or decimals. They include integers and terminating or repeating decimals. EXAMPLES: . 978, . 323232, -6, 4/5 etc… 4. Positive Rational Numbers: the set of numbers that includes whole numbers, positive fractions, and positive decimals. EXAMPLES: . 978, 57, 1. 25, 1 ¼ etc… 5. Square Number: the product when a number is multiplied by itself. EXAMPLES: 4 because 2 x 2 = 4 and 81 because 9 x 9 = 81 and so on! 6. Square Root: a factor of a number that, when squared, equals the original number EXAMPLES: 2 is the square root of 4. 9 is the square root of 81.

UNIT 1 continued 7. Ascending: increasing from least to greatest. To count upward. EXAMPLE: 1, 5, 13, 40, 53… 8. Descending: decreasing from greatest to least. To count downward. EXAMPLE: 101, 90, 87, 72, 56… 9. Order of Operations: a set of rules agreed upon by mathematicians that outline the to take when solving multioperational problems. P – parentheses, E – exponents, M or D – multiply or divide from left to right, A or S – add or subtract from left to right. EXAMPLE: 9 – 3 + 2 x 6 9 – 3 + 12 6 + 12 18 10. Percent: 1 out of 100. one-hundredth. 11. Deposit usually an amount of money placed or added to an account. To place or put EXAMPLES: deposit $100 : +100 or “just deposit your books on the table” 12. Withdrawal: usually an amount of money removed or taken out of an account. EXAMPLES: withdrawal of $99: -99