These lessons help Grade 1 students to understand that the two digits of a two-digit number represent amounts of tens and ones.

**Related Pages**

Place Value Chart

10 Times The Value

More Lessons For Grade 1

Common Core For Grade 1

a) 10 can be thought of as a bundle of ten ones — called a “ten.”

b) The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight,
or nine ones.

c) The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven,
eight, or nine tens (and 0 ones).

- I can represent 10 as ten ones.
- I can represent numbers 11 to 19 as a ten and some ones.
- I can represent multiple sets of ten using number names (2 tens is 20).
- I can explain the value of each digit in a two-digit number (place value).
- I can use base ten manipulatives (e.g., base ten blocks, Digi-Blocks, Unifix Cubes, ten frames, interlocking base ten blocks) to represent two-digit numbers
- I know how to connect numerals, words, and quantities
- I know that two-digit numbers are composed of bundles of tens and leftover ones
- I can count by tens and ones
- I know how to use base ten manipulatives (e.g., base ten blocks, Digi-Blocks, Unifix Cubes, ten frames, interlocking base ten blocks) to build and compare ten ones and ten
- I can use base ten manipulatives (e.g., base ten blocks, Digi-Blocks, Unifix Cubes, ten frames, interlocking base ten blocks) to build and compare 11 to 19
- I can match the concrete representations of 11 through 19 with the numerical representations
- I can use base ten manipulatives (e.g., base ten blocks, Digi-Blocks, Unifix Cubes, ten frames, interlocking base ten blocks) to build and model the counting by tens

**Understanding Tens And Ones**

This video explains the concept of tens and ones. It helps to develop the beginning foundation for
place value standard 1.NBT.2 in the Common Core.

**Learning Place Value - Tens And Ones (1.NBT.2)**

**Place Value Grouping Into Bundles**

We can teach place value by grouping into bundles of tens. Understanding place value which is essential
to know before going into higher math.

**Counting to 100 Using a Place Value Chart**

**Tens And Ones**

**Count To 100 By Tens**

**Place Value: Tens And Ones**

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