Name
Number and Operations in Base Ten
4.NBT.6
Lesson 4
Problem Solving:
Make a Model
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Daphne bought her mother a bunch of 12 flowers. Two of the
flowers are daisies. She divided the remaining flowers in
two groups. One group has tulips. How many of the flowers
are tulips?
Understand
What do you know?
Daphne bought 12 flowers. Two are daisies. She divided the remaining
flowers into two groups. One group has tulips.
What do you need to find?
I need to find how many flowers are tulips.
Plan
I will subtract the number of daisies. Then I will divide the remaining
number of flowers by 2.
Solve
12 flowers - 2 daisies = 10 flowers
10 flowers ÷ 2 = 5 tulips
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So, there are 5 tulips.
Check
I will use addition to check.
5 tulips + 5 other flowers + 2 daisies = 12 flowers
So, the answer is correct.
Lesson 4 My Homework351
Problem Solving
Solve each problem by making a model.
1. There are two equal groups of 8 books on the shelf.
One group has reading books. In the other group, three
of the books are math books, and the rest are science
books. How many science books are there?
2.
5
Use Math Tools There are 364 trees
planted in 2 equal rows. One row has pine trees.
The rest are oak trees. How many oak trees are there?
3. There are 3 types of fish in a pond. There are a total of
162 fish. There is the same number of each type of fish.
How many of each type of fish are in the pond?
5. Joel divided 68 CDs evenly on 4 shelves in his bedroom.
The CDs are arranged in alphabetical order, with the first
shelf containing the letters A—E. If there are 13 CDs filed
under A—D, how many CDs are filed under the letter E?
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4. Monica and her parents spent $170 on new swimsuits.
Monica’s swimsuit cost $35. Her mom’s swimsuit cost
twice as much as Monica’s. How much did her dad’s
swimsuit cost?