Evaluating and Writing Expressions
Selected Reading
- Translating a Phrase Into a Two-Step Expression
- Translating a Phrase Into a One-Step Expression
- Writing a One-Step Expression For a Real-World Situation
- Evaluating an Expression With One Operation and an Exponent
- Evaluating a Formula
- Evaluating an Algebraic Expression With Two Operations
- Evaluating an Algebraic Expression With Multiplication or Division
- Evaluating an Algebraic Expression With Addition or Subtraction
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Translating a Phrase Into a Two-Step Expression
Translating a Phrase Into a Two-Step Expression
If Sally’s age is 20 years less than thrice Molly’s age, write a two-step expression to represent the same.
Solution
Step 1:
Let Molly’s age be x.
Thrice Molly’s age is 3x
Step 2:
20 years less than thrice Molly’s age is 3x – 20
So the two-step expression representing Sally’s age would be 3x – 20
If Clara has 10 toys more than twice Capri’s number of toys, write a two-step expression to represent the same.
Solution
Step 1:
Let Capri’s number of toys be y.
Twice Capri’s number of toys = 2y
Step 2:
10 toys more than twice Capri’s number of toys = 2y + 10
So the two-step expression representing Clara’s number of toys would be 2y + 10