Subscribe

3rd grade · Math · Unit 6 of 18

Times Tens

Multiply by 10, 20, 30 ...

What your child practices

Multiplying a one-digit number by a multiple of ten (like 6 × 40) using a basic fact and place value.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 3.4(G) · multiplying a one-digit number by a multiple of 10

How we explain it

Children can open this short lesson before they practice.

  1. Use the basic fact first.
  2. Then multiply by 10: the answer is that many tens.
  3. 6 × 40 is 6 × 4 tens.

Example: What is 6 × 40? 6 × 4 = 24. 24 tens = 240. Answer: 240

Times Tens in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 6 of 18 in 3rd grade Math, after Multiplication and before Division.

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: Texas Education Agency (TEA)

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

    2 × ? = 80. What number is missing?

    • 10
    • 30
    • 40
    • 70
    • 400

  2. Question 2

    8 × 9 = 72. So what is 8 × 90?

    • 700
    • 72
    • 7200
    • 82
    • 720

  3. Question 3

    What is 5 × 50?

    5 × 50 = ?

    • 25
    • 55
    • 2500
    • 250

  4. Question 4

    There are 7 trays with 20 beads in each. How many beads are there?

    • 140
    • 110
    • 27
    • 14
    • 1400

  5. Question 5

    8 × 9 = 72. So what is 8 × 90?

    • 720
    • 72
    • 750
    • 82
    • 7200

  6. Question 6

    8 × ? = 320. What number is missing?

    • 60
    • 70
    • 400
    • 40
    • 50

More 3rd grade