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Grade 7 · Math · Unit 14 of 14

Expressions & Equations

Evaluate, balance and solve

What your child practises

Children tell an expression from an equation, evaluate expressions, and solve equations by doing the same thing to both sides.

Newfoundland and Labrador Curriculum curriculum outcome: Patterns and relationships (by Grade 9) · expressions, equations and the distributive property

How we explain it

Children can open this short lesson before they practise.

  1. An expression has no equals sign: 3n + 2. An equation does: 3n + 2 = 11.
  2. Do the same operation to both sides to keep an equation balanced.
  3. Undo addition first, then undo multiplication.

Example: Solve 2n + 3 = 11. Subtract 3 from both sides: 2n = 8. Divide both sides by 2: n = 4. Answer: n = 4

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    To solve x + 5 = 12, what do you do to both sides?

    • Add 5
    • Subtract 5
    • Subtract 12
    • Multiply by 5

  2. Question 2

    Solve: 5x + 2 = 27

    • x = 29
    • x = 25
    • x = 6
    • x = 5

  3. Question 3

    Solve: 2x + 3 = 11

    • x = 7
    • x = 4
    • x = 14
    • x = 8

  4. Question 4

    To solve 3x = 18, what do you do to both sides?

    • Divide by 3
    • Add 3
    • Subtract 3
    • Multiply by 3

  5. Question 5

    A scale is level with x + 3 on one side and 10 on the other. If 3 is taken from both sides, what is left?

    • x = 13
    • x = 7
    • x = 10
    • x = 3

  6. Question 6

    What is the value of 10 − n when n = −4?

    • 6
    • −6
    • 14
    • −14

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