Standard Alignments:

CCSS Math: 1.NBT.2

1.NBT.2 Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

1.NBT.2.C

1.NBT.2.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).

Related Lessons

Identify the Place & Value of Digits in a Number (2 of 2)
Add Two-Digit Numbers (Without Composing)
Count and Write Numbers to 120
Count and Write Numbers to 50
Compare Two-Digit Numbers Using Symbols
Determine Ten More or Ten Less Than a Number
Count Objects 20-100
Identify the Place & Value of Digits in a Number (1 of 2)
Count By Twos
Count Objects 100-120
Compare Two Numbers (No Symbols)
Count by Fives
Interpret Figures of Speech - Allusions
Add Two-Digit Numbers (With Composing)
Represent Numbers 11-19

Related Concepts

Identify the Place & Value of Digits in a Number (1 of 2)
Flashcards Fractions on a Number Line
Flashcards Identify Place Value of a Three-Digit Number
Represent Objects from 0 to 10