Chapter 3 Math Assessment

Which expression is equal to 24 X 35

• 20 + 4 X 30 + 5

• 20 + (4 X 3) + 5

• 20 X 30 + 20 X 5 + 4 X 30

• (20 X 30) + (20 X 5) + (4 X 30) + (4 X 5)

Sally uses an area model to solve 28 X 25. Which letter shows her mistake in multiplying?

• A = 400

• B = 100

• C = 90

• D = 20

Enter the unknown number that makes the equation true: 45 X 26 = 800 + 240 + _____ +30

• 600

• 100

• 230

• 300

Martha solved the multiplication problem of 11 X 12 by multiplying 10 X 12 and then adding 11. Select the statement that best explains if Mary Lou's strategy is correct.

• Martha is incorrect because she should have added 12 instead of 11

• Martha is corrected because she can change the 11 to 10 because it is easier to multiply 10 and then add another group of 11.

• Martha is correct because she can change the 11 to 10 because it is easier to multiply by 10 and then add another group of 11.

• Martha is correct because 11 X 12 is the same as 10 groups of 12, plus another 11

Find the product of 97 X 35

• 4395

• 2735

• 1267

• 3395

Alexa has 21 marbles. Zoey has 19 times as many marbles as Alex does. How many marbles does Zoey have?

• 189

• 399

• 589

• 499