Expanded Form to 50 using Base 10 Blocks 1-90

Transition from ten frames to using Base 10 blocks to unitize and model numbers in units of ten and one. What's 28? 20 and 8. It's also 2 tens and 8 ones. To know there are 8 ones, subitize the 2 that are missing. To encourage Base 10 thinking, use both formal names and nicknames. 28 is both "twenty-eight" and "2 ten 8."

 
 

1. Learn

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Transition from ten frames to using Base 10 blocks to unitize and model numbers in units of ten and one. What's 28? 20 and 8. It's also 2 tens and 8 ones. To know there are 8 ones, subitize the 2 that are missing. To encourage Base 10 thinking, use both formal names and nicknames. 28 is both "twenty-eight" and "2 ten 8."

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2. Practice

Lesson
1-90
Lesson
1-90
Lesson
1-90
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3. Apply

POD
1-90
POD
1-90
POD
1-90
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