Chapter 2 (Multiplication) Study Guide: Students will have a test over the following content on Friday, November 15th. I have included example questions under each standard that your child can practice at home to help prepare. Your child also has pages in his or her red math folder that may help with the studying process. Please also check out the fourth grade website. I have included a practice test to help prepare for the assessment. Some of the questions below came from the practice test, but there are more questions available to help practice.

4.OA.1 (Standard)- Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 x 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.

Jack has 2,613 songs saved on his computer. Dexter has 4 times as many songs saved on his computer as Jack has. How many songs does Dexter have saved on his computer?

Kristin has 28 books. This is 7 times as many books as Gail has. Which equation represents how to find the number of books Gail has?

a) 28 = n + 7 b) 28 = 7 x n c) 28 + 7 = n d) 28 x 7 = n

4.OA.2 (Standard)- Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

Example questions: (See packet from lesson 2.2 in red math folder)

In Jim’s class, 5 times as many students take the bus as those who walk. A total of 24 students walk or take the bus. How many more students take the bus than walk to school? A hobby shop has 4 times as many model airplanes as model helicopters. The total number of models is 35. How many model airplanes does the hobby shop have?

4.NBT.5 (Standard)- Multiply a whole number of up to four digits by a one-digit whole number using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

A farmer planted 8 rows of corn. Each row had 142 corn plants in it. The farmer drew the diagram to help him find how many corn plants he has.

100 40 2

8

How many corn plants did the farmer plant? ______

Samantha has 4 boxes of action figures. Each box contains 198 figures. Which expression shows a strategy Samantha can use to find the product of 4 x 198?

a) 4 x (200 + 2) b) 4 x (200 – 2)

c) 4 x (200 x 3) d) 4 x (200 + 98)

A grocery store has 367 cans of vegetables on each of 4 shelves. Which expression can be used to find how many cans of vegetables are on the four shelves? a) (4 x 300) + (6 x 10) + 1 x 7) b) (4 x 300) + (4 x 60) + 7

c) (4 x 300) + (4 x 60) + (4 x 7) d) (4 x 300) + 60 + 7

4.OA.3 (Standard)- Solve multi-step word problems posed with whole numbers and having whole- number answers using four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

A mall survey showed that 964 people entered at the main entrance in one hour. Which is the best estimate of how many people will enter at the main entrance in 6 hours?

a) 900 b) 1,000 c) 5,000 d) 6,000

The Community Youth Center sold raffle tickets to raise money for supplies. They sold 62 raffle tickets for $8 each. Mrs. Hernandez says they raised about $480. Which statement best describes Mrs. Hernandez’s estimate?

a) The estimate is reasonable because 10 x 70 = 700. b) The estimate is reasonable because 8 x 60 = 480. c) The estimate is not reasonable because 480 is not the product of 8 x 62. d) The estimate is reasonable because 8 x 500 = 4,000.

Chad wrote this pattern on his paper.

4 x 3 = 12 4 x 30 = 120 4 x 300 = 1,200 4 x _____ = 12,000

What is the unknown number? ______