Standard Algorithm
Break Apart Strategy
Drawing Base 10 Blocks
Number Lines and Balancing Equations
Word Problems
100
3 + 5 + 7 = ?
15
100
Solve using the break apart strategy.
15 + 4 = ?
10 + 0 = 10
5 + 4 = 9
10 + 4 = 19
100
Solve by drawing a picture with base 10 blocks.
34 + 21 = ?
34 + 21 = 55
100
Use jumps on the number line to show 10 + 7 = ?
100
Jenn has 15 balls. Rodney has 7 balls. How many balls do they have in all?
22 balls
200
10 + 13 + 9 = ?
32
200
Solve using the break apart strategy.
28 + 37 = ?
20 + 30 = 50
8 + 7 = 15
50 +15 = 65
200
Solve by drawing a picture with base 10 blocks.
36 + 56 = ?
36 + 56 = 92
200
Fill in the blank to make this equation true.
15 + 4 = ___ + 10
15 + 4 = 9 + 10
200
I ate 4 pieces of Starburst. My brother ate 8 and my cousin ate 7. How many pieces of Starburst did we eat in total?
19 pieces of Starburst
300
3 + 7 + 5 + 2=?
17
300
Solve using the break apart strategy.
30 + 57 =?
30 + 50 = 80
0 + 7= 7
80 + 7 = 87
300
Solve by drawing a picture with base 10 blocks.
125 + 230 = ?
125 + 230 = 355
300
Which of these equations is true?
13 + 2 = 0 + 15
9 + 2 = 5 + 6
12 + 6 = 10 + 9
13 + 2 = 0 + 15
9 + 2 = 5 + 6
300
Allison has 12 outfits for her doll. Her doll also has 24 accessories. "I have 36 things to dress my doll up with!" she says. Is Allison right? How do you know?
Allison is correct, because 12 + 24 is 36.
400
14 + 17 + 31 + 25 =?
87
400
Solve using the break apart strategy.
46 + 51 = ?
40 + 50 = 90
6 + 1 = 7
90 + 7 = 97
400
Solve by drawing a picture with base 10 blocks.
351 + 67 = ?
351 + 67 = 418
400
Use jumps on the number line below to show 47 + 34 = ?
400
How many cards did these students collect all together?
Sally 21 cards
James 14 cards
Stan 31 cards
Zain 17 cards
21 + 14 + 31 + 17 = 83 cards
500
What is 10 more than 195?
205
500
Maddie solved 67 + 23 using the break apart strategy.
60 + 7
+ 20 + 3
80 + 10 = 90
Explain Maddie's strategy and why it works.
Maddie's strategy worked because she split up 67 into 60 + 7 and then 23 into 20 + 3. She added 60 to 20 to get 80. Then she added 7 and 3 to get 10. Finally, she added 80 and 10 to get 90.
500
Solve by drawing a picture with base 10 blocks.
402 + 215 = ?
402 + 215 = 617
500
What number sentence is shown on the number line below?
68 + 12 = 80
500
Sally 21 cards
James 14 cards
Stan 31 cards
Zain 17 cards
Which partnership has more cards- Sally and James or Stan and Zain? How do you know?
Stan and Zain have more cards, because 48 is greater than 35.