# Tens and Ones

Videos and songs to help Grade 1 kids understand that the two digits of a two-digit number represent amounts of tens and ones.

Understand the following as special cases:
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).

Common Core: 1.NBT.2

### Learning Targets:

• 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
Related Topics:

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) Worksheet for Tens and Ones Place Value

Place Value Grouping into Bundles
This teaches place value by grouping into bundles of tens. Great lesson to learn for understanding place value which is essential to know before going into higher math. Counting to 100 Using a Place Value Chart. Concept of Place Values. Place Value
Tens and Ones.

Count to 100 by Tens. Place Value: Tens and Ones.

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