What Strategies Can You Use to Show Addition?
56 + 27 = ?
Counting up using 10’s then 1’s:
56 + 10 = 66, 66 + 10 = 76, 76 +4 = 80, 80 + 3 = 83
or
56 + 10 = 66, 66 + 10 = 76, 76 +1= 77 +1 = 78, etc. until you have
put 7 ones on
Drawing the tens and ones, composing a 10 as needed:
Created by Mary Stroot 2013
Using expanded notation (place value):
56 = 50 + 6
50 + 6
27 = 20 + 7
+ 20 + 7
70 + 13 = 83
(Note: 70 + 13 can also be viewed as 70 + 10 + 3)
Using a number line using 10’s then 1’s
56
66
76
80
83
Using a number line using 1’s then 10’s
56
60
63
73
83
Using a number line using 1’s then 10’s then the rest of the ones
56
60
70
80
83
There are other ways to show how addition works!! See if you can discover
another way!
Created by Mary Stroot 2013