Subscribe

7th grade · Math · Unit 8 of 17

Fractions

Add, subtract, multiply, divide

What your child practices

Adding and subtracting fractions with different denominators, and multiplying and dividing a fraction by a fraction.

Alaska content standards learning standard: 7.NS.1; 7.NS.2 · adding, subtracting, multiplying and dividing fractions

How we explain it

Children can open this short lesson before they practice.

  1. To add or subtract, rename the fractions with a common denominator.
  2. To multiply, multiply the tops and multiply the bottoms.
  3. To divide, multiply by the reciprocal (flip the second fraction).

Example: 2/3 ÷ 1/6 = ? Flip 1/6 to 6/1 and multiply. 2/3 × 6 = 12/3. 12/3 = 4. Answer: 4

Fractions in Alaska

In the Alaska content standards, this is unit 8 of 17 in 7th grade Math, after Probability and before Percents & Proportions.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Alaska Department of Education and Early Development

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

    What is 1/2 + 1/5?

    1/2 + 1/5

    • 2/7
    • 4/5
    • 7/10

  2. Question 2

    A jug is 2/4 full. You pour out 2/5 of what is in it. What fraction of the whole jug did you pour out?

    • 2/5
    • 1/5
    • 4/9

  3. Question 3

    What is 3/5 − 1/8?

    3/5 − 1/8

    • 2/3
    • 19/40
    • 1/2

  4. Question 4

    What is 2/3 + 2/4?

    2/3 + 2/4

    • 1 1/4
    • 1 1/6
    • 4/7

  5. Question 5

    What is 4/8 × 2/6?

    4/8 × 2/6

    • 4/7
    • 3/7
    • 1/6

  6. Question 6

    What is 1/3 − 2/8?

    1/3 − 2/8

    • 1/5
    • 1/12
    • 1/8

More 7th grade