Envision Math 3rd Grade Textbook Answer Key Topic 2.4 Problem Solving
Problem Solving
Try, Check, and Revise
Tad, Holly, and Shana made 36 posters all together. Shana made 3 more posters than Holly. Tad and Holly made the same number of posters.
Question.
How many posters did Shana make?
Answer:
Guided Practice
Do you know HOW?
Question 1.
Peg and Pat are sharing 64 crayons. Pat has 10 more crayons than Peg. How many crayons does each girl have?
Answer:
Do you UNDERSTAND?
Question 2.
Look at the diagram for Problem 1. Why aren’t Peg’s part and Pat’s part of the rectangle the same size?
Answer:
Question 3.
Write a Problem Write a problem that can be solved by using reasoning to make good tries.
Answer:
Independent Practice
Question 4.
All together, Rod has 38 crayons, markers, and pencils. He has 5 more crayons than markers. He has the same number of markers and pencils. How many markers does he have?
Answer:
Plan
Use reasoning to make good tries.
Then check.
Try: 10 + 10 + 13 = 33
Check: 33 < 36
Too low, I need 3 more.
Try: 12 + 12 + 15 = 39
Check: 39 > 36
Too high, I need 3 less.
Solve
Revise, using what you know.
Try: 11 + 11 + 14 = 36
Check: 36 = 36
This is correct.
Shana made 14 posters.
Use the pictures at the right for 5 and 6.
Question 5.
The clerk at the flower store puts all the roses into two vases. One vase has 2 more roses than the other vase. How many roses are in each vase?
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Question 6.
Edna, Jay, and Bob bought all of the carnations in the flower store. Edna bought 2 more than Jay. Bob and Jay bought the same number. How many carnations did Edna buy?
Answer:
Question 7.
Mr. Tyler bought one iris for $1.25 and 3 roses for $3 each. How much did Mr. Tyler spend for the roses?
Answer:
Question 8.
Cam bought an iris for $1.25. He paid with 6 coins. What coins did he use?
Answer:
Question 9.
Jared is thinking of two numbers. They have a sum of 12 and a difference of 6. What are the two numbers?
A. 11 and 1
B. 10 and 2
C. 9 and 3
D. 8 and 4
Answer:
Question 10.
Hanna read that there are 22 types of crocodiles and alligators in all. There are 6 more types of crocodiles than alligators. How many types of crocodiles are there? How many types of alligators are there?
Answer: