Writing & Interpreting Expressions
Write an expression for:
The sum of 8 and 12
8 + 12
Write an expression for:
5 less than 12
12 − 5
Evaluate the expression.
(8 + 4) × 3
36
Rule: Start at 2, add 3
Write the first four numbers in the pattern.
Pattern: 2, 5, 8, 11
Look at the pattern:
3, 6, 9, 12, 15
Write the rule that creates the pattern?
Add 3
Write an expression for:
7 more than 15
15 + 7
Write an expression for:
Twice the sum of 6 and 4
2(6 + 4)
Evaluate the expression.
18 − (6 + 3) × 2
0
Rule: Start at 4, add 4
Write the first five numbers in the pattern?
Pattern: 4, 8, 12, 16, 20
Look at the pattern:
5, 10, 15, 20, 25
Write the rule that creates the pattern?
Add 5
Write an expression for:
The product of 6 and 9
6 × 9
Write an expression for:
Half of the difference between 18 and 10
(18 − 10) ÷ 2
Evaluate the expression.
24 ÷ [4 + (2 × 2)]
3
Rule: Start at 10, subtract 2
Write the first four numbers in the pattern.
Pattern: 10, 8, 6, 4
Look at the pattern:
4, 8, 16, 32
Write the rule that creates the pattern?
Multiply by 2
What does the expression mean?
4 + 3 × 5
(Do NOT solve it.)
Add 4 to the product of 3 and 5
What does this expression mean?
3(8 + 2)
Do NOT solve it.
Three times the sum of 8 and 2.
Evaluate the expression.
30 − {6 + [4 × (3 + 2)]}
4
Rule: Start at 5, add 5
What is the 4th number in the pattern?
20
Look at the pattern:
20, 18, 16, 14, 12
Write the rule that creates the pattern?
Subtract 2
What does the expression represent?
(20 − 8) ÷ 4
(Do NOT solve.)
Subtract 8 from 20, then divide the result by 4.
Write an expression for:
7 more than twice 9
(2 × 9) + 7
Evaluate the expression.
{40 − [6 × (4 + 1)]} ÷ 5
2
Rule: Start at 3, multiply by 2
What is the fifth number in the pattern?
48
Look at the pattern:
7, 14, 21, 28, 35
Write the rule that creates the pattern?
Add 7