Explore Lux

5th grade math · Unit 4: Dividing whole numbers

Estimating with two-digit divisors

What this lesson shows

496 ÷ 24: 24 × 20 = 480 and 24 × 30 = 720, so the answer is between 20 and 30, and near 20.

The worked example

The lesson works this one step by step: 496 ÷ 24. Then your kid tries one like it on paper.

The steps

  1. Think in tens of the divisor
  2. Find the two tens
  3. Pick the nearer one

Helping at home

Think in tens of the divisor: 24 × 20 = 480 and 24 × 30 = 720, so 496 ÷ 24 is between 20 and 30. Then ask which ten the dividend is nearer. Estimate only; no long division on this page.

If your kid gets stuck

Which two tens is it between? Which one is it nearer?

Watch it with Lux

With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.

See how Lux works

Standards

  • Common Core 5.NBT.B.6
    Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Matches standards in 50 statesSee each state's code

More in this unit