Missing Number
What are we looking for in this equation?
A part or a whole?
52 + _____ = 69
A part
What is the sum of 17 and 4? Use a model.
The sum of 17 and 4 is 21.
What is the difference between 40 and 37?
Use a model.
3
Lucas collected 128 stickers on Monday.
On Tuesday, he collected 47 more.
How many stickers does Lucas have in total?
Lucas has 175 stickers.
What are we looking for in this equation?
A part or a whole?
___ - 56 = 32
A whole
Find the sum of 25 and 32. Use a model.
The sum of 25 and 32 is 57.
Find the difference between 82 and 29.
Use a model.
53
The class read 265 pages of their book in the morning.
In the afternoon, they read 38 more pages.
What is the sum of the pages they read?
They read 303 pages in total.
Find the missing number:
____ + 28 = 88
Use a model.
60
315 + 120 =
Use a model.
435
True or False: The difference between 41 and 29 is 28.
False.
At recess, Ms. Gina brought a box with 179 crayons.
She found another box with 52 crayons.
How many crayons does she have altogether?
Ms. Gina has 231 crayons altogether.
Find the missing number.
____ - 97 = 23
Use a model.
120
The sum of 78 and 340 is ___________.
Use a model.
The sum of 78 and 340 is 418.
The difference between 109 and 230 is ______.
Use a model.
121
A puzzle has 150 pieces.
Stella has already put together 86 pieces.
How many pieces are left to finish the puzzle?
There are 64 pieces left to finish the puzzle.
229 - _____ = 189
Use a model.
40
Layla found the sum of 398 and 42, and her answer was 431. Is her answer correct?
Her answer is incorrect.
CHALLENGE:
Ms. Gina bought a bag of popcorn in the cafeteria.
The popcorn costs 84 pesos.
She only had 39 pesos.
Ms. Caroline offered to pay the difference.
What is the difference?
The difference is 45 pesos.
A notebook costs 95 pesos.
Gabriel has 58 pesos.
What is the difference?
The difference is 37 pesos.