Substituting into expressions
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. If n = 4, find 3n + 3.
2. If n = 5, find 3n + 3.
3. If n = 3, find 3n + 4.
4. If n = 6, find 2n + 4.
5. If n = 3, find 2n + 5.
Answer key · Substituting into expressions
1. 15
Substitute n = 4: 3n means 3 × 4.
3 × 4 = 12.
12 + 3 = 15.
2. 18
Substitute n = 5: 3n means 3 × 5.
3 × 5 = 15.
15 + 3 = 18.
3. 13
Substitute n = 3: 3n means 3 × 3.
3 × 3 = 9.
9 + 4 = 13.
4. 16
Substitute n = 6: 2n means 2 × 6.
2 × 6 = 12.
12 + 4 = 16.
5. 11
Substitute n = 3: 2n means 2 × 3.
2 × 3 = 6.
6 + 5 = 11.
Try it together
Choose a question from the printable. Use objects or a drawing to show your thinking, then explain your method to someone at home.