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Curriculum › Math ›Grade 2

Grade 2 Math · Level 3, Place Values and Representations

Regroup and Break Numbers

Rewrite numbers in equivalent ways, such as exchanging one ten for ten ones.

Questions like

  • 47 = 4T+7O = 3T+17O

How the lesson starts: Regroup and Break Numbers

  1. Farmer Ben's eggs

    Cluck cluck! Farmer Ben collected lots of eggs. A big crate holds 100 eggs. A carton holds 10. The rest roll around loose. Let's break his eggs into parts!

  2. Break a big number

    Ben has 629 eggs. 6 big crates: that's 6 hundreds. 2 cartons: that's 2 tens. 9 loose eggs: that's 9 ones. 629 = 6 hundreds + 2 tens + 9 ones.

  3. Let's break 358

    Now 358. How many crates? The hundreds digit is 3. How many cartons? The tens digit is 5. How many loose? The ones digit is 8. Write the counts: 3, 5 and 8. Not 300!