Evaluate variable expressions
Key Notes :
⌛ A variable is a letter that represents an unknown number.
⌛ An expression is a group of numbers, symbols, and variables that represents another number
Learn with an example
✈️ Find the value of the expression
y · 3
for y = 5._____
- Replace the variable y with the number 5.
- y · 3
- 5 · 3
- Now simplify: 5 · 3 = 15
✈️ Find the value of the expression
b ÷ 10
for b = 20.____
- Replace the variable b with the number 20.
- b ÷ 10
- 20 ÷ 10
- Now simplify: 20 ÷ 10 = 2
✈️ Find the value of the expression
15 ÷ p
for p = 5.____
- Replace the variable p with the number 5.
- 15 ÷ p
- 15 ÷ 5
- Now simplify: 15 ÷ 5 = 3
Let’s practice!🖊️
