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Mathematics · Grade 2

Hundreds, Tens and Ones

Ten tens make a hundred. Learners build three-digit numbers with base-ten blocks, read and write them as numerals, number names and expanded form (406 = 400 + 6), find the value of each digit, and show the same number in more than one way, such as 254 as 25 tens and 4 ones.

  • 3 lessons
  • About 60 minutes
  • Place value check: 8 questions
  • Ways to answer: fill in the blanks, choose an answer, match pairs, type a number and sort into groups
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What learners will discover

  • Explain that 100 is ten tens and that the three digits of a number show hundreds, tens and ones, including when a digit is 0.
  • Read and write numbers to 1,000 as numerals, number names and expanded form.
  • Find the value of a digit from its place and show a number in more than one way (254 = 2 hundreds 5 tens 4 ones = 25 tens 4 ones).

Lessons

  1. Ten tens make a hundred 6 steps3 practiceabout 20 min
  2. Three ways to write a number 5 steps3 practiceabout 20 min
  3. Digit values and other ways 6 steps3 practiceabout 20 min
  4. Place value check 8 questions at the end

Keep exploring

Games to practice with

  • Number-Line HopHelp the frog hop to the right number — from counting to negative fractions.
  • Paint by AnswersSolve each space, dip your brush and watch a picture come to life.
  • Place-Value WorkshopBuild numbers with rods and cubes — and trade ten ones for a ten.

More 2nd grade math

Guide for grown-ups