Divisibility Rules
Is 13 divisible by 3?
What are the four operations?
Multiplication, Division, Addition, Subtraction
What is an example of a natural number?
Answers Vary; but they should be a counting number greater than 0.
Which of the following terms are like:
3w + 4w + 10
3w + 4w
Partial Products and Helper Numbers
Which operation does the clue word "of" signal?
Multiplication
What do you call an equal relationship between two expressions?
Simplify the following expression by combining the like terms:
12 + 4x - 2x
12 + 2x
21 x 51 ?
20 x 50
Which of the following numbers are divisible by 5? Hint: there can be more than one answer!
75, 900, 852, 634, 503
75 and 900
Which operation is signaled by the clue word "difference?"
Subtraction
What do you call a number that we do not know represented by a symbol (usually a letter)
A variable
Simplify the following expression by combining the like terms:
9 - 6 + 2x + 6x + 3
8x + 6
23 x 45
( 20 + 3 ) x ( 40 + 5 )
No to all; 31 is prime!
In the following word problem what clue word is needed: Fred has thirty-six muffins, which need to be split into dozens. How many does he need?
Division
What do you call a single number, variable, or product? This is the smallest moveable part of an equation or expression.
Term
Simplify the following expression by combining the like terms:
2x + 3 + 6y
2x + 3 + 6y
29 x 18
Hint: Don't forget to label it an OVER or UNDER estimation.
Is 44 divisible by 2? 3? 4? 5? 6? 9? 10? 11?
Yes to 2, 4, and 11.
In the following word problem, what operation is needed?
There are eight children in the classroom, each student will get three pencils. How many pencils will the teacher have to give out?
Multiplication
What do you call a number that has 3 or more factors?
Composite Number
Simplify the following expression by combining the like terms:
3y - 12 + 5x - 2 + 2y
5y + 5x - 14
Use partial products to make an estimate for:
25 x 64
Hint: Only add the top 3 numbers together with partial products
20 x 4 = 80
60 x 5 = 300
So about 1580