subtraction with base 10 models created by jamie unverzagt
TRANSCRIPT
Subtraction with Base 10 Models
Created by Jamie Unverzagt
Tens Ones
62- 8
Let’s start with 62 and then take away 8.
Tens Ones
62- 8
62 is 6 tens and 2 ones.
Tens Ones
62- 8
Can you take away 8 ones?
Tens Ones
62- 8
How can you get more ones?
Tens Ones
62- 8
How many tens and ones do you have now?
5 12
Tens Ones
62- 8
Now can you take away 8 ones?
5 12
How many ones are left?
4
Tens Ones
62- 8
5 12
How many tens are left?
45
Tens Ones
41- 13
41 is 4 tens and 1 one.
Tens Ones
41- 13
Can you take away 3 ones?
Tens Ones
41- 13
How can you get more ones?
Tens Ones
41- 13
How many tens do you have now?
3
Tens Ones
41- 13
How many ones do you have now?
3 11
YouYou had 1had 1 one and you got 10 moregot 10 more.
Tens Ones
41- 13
3 11
Do you still have 41 total? Explain.Do you still have 41 total? Explain.
10 20 30
31 32 33 34 35 36 37 38 39 40
41
Tens Ones
41- 13
3 11
YES!YES! When you regroup, you still have When you regroup, you still have the same amount. You just show it a the same amount. You just show it a different way!different way!
10 20 30
31 32 33 34 35 36 37 38 39 40
41
Tens Ones
41- 13
Now can you take away 3 ones?
3 11
How many ones are left?
8
Tens Ones
41- 13
3 11
Can you take away 1 ten?
8
Tens Ones
41- 13
3 11
How many tens are left?
82
Tens Ones 24- 5
1 14Now Try This:
91
Excellent Job!
Tens Ones 30- 12
2 10Now Try This:
8
You’ve Got It!
1
Math Journal Topic:
Explain how to solve 53 – 9 using pictures, numbers, and words. Will you have to regroup? Why or why not?