Grade 2
Mathematics
Unit: 06 Lesson: 01
Modeling Addition and Subtraction with Base-Ten Blocks SAMPLE
KEY
1.
45 + 34 = 79
HUNDREDS
3.
TENS
TENS
4.
ONES
6.
ONES
TENS
8.
TENS
ONES
TENS
ONES
85 – 59 = 26
HUNDREDS
08/13/12
ONES
75 – 42 = 33
HUNDREDS
ONES
TENS
98 + 12 = 110
HUNDREDS
62 – 58 = 4
HUNDREDS
22 + 32 = 54
HUNDREDS
69 – 16 = 53
HUNDREDS
7.
2.
ONES
29 + 64 = 93
HUNDREDS
5.
TENS
TENS
ONES
page 1 of 1
Grade 2
Mathematics
Unit: 06 Lesson: 01
Addition/Subtraction Base-Ten Story Problems SAMPLE KEY
1. Noah made a mess again. On his floor are 33 toy soldiers
and 66 cars. How many toys are on his floor in all?
Number Sentence
33 + 66 =?
Base-ten Model
HUNDREDS
TENS
Answer
99
ONES
2. I have a pain in my tummy. My mom said I ate too much candy. I
only ate 24 pieces of hard candy and 16 Hershey's Kisses. How
many pieces of candy did I eat?
Number Sentence
24 + 16 =?
Base-ten Model
HUNDREDS
TENS
Answer
ONES
40
3. Christopher was practicing basketball and made 56 attempts. He
was able to make 23 baskets. How many did he miss?
Number Sentence
56 – 23 =?
Base-ten Model
HUNDREDS
TENS
Answer
ONES
33
4. Brittany jogged 25 laps around the track. Kylie jogged 18 laps. How
many more laps did Brittany jog around the track?
Number Sentence
25 – 18 =?
Base-ten Model
HUNDREDS
08/13/12
TENS
Answer
ONES
7
page 1 of 2
Grade 2
Mathematics
Unit: 06 Lesson: 01
Addition/Subtraction Base-Ten Story Problems SAMPLE KEY
5. At our farm, we have 27 sheep and 49 goats. How many farm
animals do we have in all?
Number Sentence
27+ 49 =?
Base-ten Model
HUNDREDS
TENS
Answer
ONES
76
6. Samantha fell and broke her arm. She had to wear a cast. 15 boys
and 23 girls wrote their names on her cast. How many people in all
wrote on her cast?
Number Sentence
15 + 23 =?
Base-ten Model
HUNDREDS
TENS
Answer
ONES
38
7. Kylie wants to ride the tug boat, which costs 45 tokens. She only
has 13 tokens. How many more tokens does she need?
Number Sentence
45 – 13 =?
Base-ten Model
HUNDREDS
TENS
Answer
ONES
32
8. Emma has a cold. She has a box of tissues. There were 71 tissues in
the box. She has used 14 of them. How many tissues are left?
Number Sentence
71 – 14 =?
08/13/12
Base-ten Model
HUNDREDS
TENS
Answer
ONES
57
page 2 of 2