UNIT 1 - NUMBER SYSTEM FLUENCY
PARENT LETTERS
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OVERVIEW
In this unit students will:
- Find the greatest common factor of two whole numbers less than or equal to 100
- Find the least common multiple of two whole numbers less than or equal to 12
- Use the distributive property to express a sum of two whole numbers 1-100 with a common factor as a multiple of a sum of two whole numbers with no common factor.
- Interpret and compute quotients of fractions
- Solve word problems involving division of fractions by fractions using visual fraction models and equations to represent the problem.
- Fluently divide multi-digit numbers using the standard algorithm
- Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.
VOCABULARY
- Algorithm: a step-by-step solution to a problem.
- Difference: The amount left after one number is subtracted from another number.
- Distributive Property: The sum of two addends multiplied by a number equals the sum of the product of each addend and that number.
- Dividend: A number that is divided by another number.
- Divisor: A number by which another number is to be divided.
- Factor: When two or more integers are multiplied, each number is a factor of the product. "To factor" means to write the number or term as a product of its factors.
- Greatest Common Factor: The largest factor that two or more numbers have in common.
- Least Common Multiple: The smallest multiple (other than zero) that two or more numbers have in common.
- Measurement Model of Division: When we know the original amount and the size or measure of ONE part, we use measurement division to find the number of parts. Ex: 20 is how many groups of 4?
- Minuend: The number that is to be subtracted from.
- Multiple: The product of a given whole number and an integer.
- Quotient: A number that is the result of division.
- Partitive Model of Division: When we know the original amount and the number of parts, we use partitive division to find the size of each part. Ex: 20 is 4 groups of what unit?
- Reciprocal: Two numbers whose product is 1. The reciprocal of a fraction can be found by inverting that fraction (switching the denominator and numerator).
- Sum: The number you get by adding two or more numbers together
- Subtrahend: The number that is to be subtracted.
- Product: A number that is the result of multiplication.