Chapter 4 Test

Tell me in words me how to find 30 x 80 using mental math. State the product in your explanation. Mental math is math you can do in your head.

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Mr. Burn’s class is taking a field trip to the planetarium. The trip will cost $39 for each student and Mr. Burn is free. There are 18 students in his class. PART A: Mr. Burn estimates it will cost $500 for the class to go on the field trip. Is his estimate reasonable? Explain why you chose Yes or No. Include your estimate in your answer to the question. Prove your answer with work on paper.

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Mr. Burn’s class is taking a field trip to the planetarium. The trip will cost $39 for each student and Mr. Burn is free. There are 18 students in his class. PART B: What is the actual cost of the field trip for the students? Show your work on paper.

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There are 17 classes in the fourth grade. Each class has 26 students. Write a number sentence (equation) that will provide a reasonable estimate for the number of students in the fourth grade.

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Albert completed the inside of the area model incorrectly. What exactly did Albert do wrong? Do not say "Albert multiplied wrong/incorrectly."

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Draw an area model on your paper and solve 43 x 28 using the model. Type the product below.

Alex has 24 marbles. Zach has 19 times as many marbles as Alex. How many marbles does Zach have? Prove your answer with work on paper.

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The school principal orders 6 new chalkboards for each grade. There are 3 grades in the school. Each new chalkboard cost $98. Find the total cost for the new chalkboards. Show your work on paper.

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CCSS.MATH.CONTENT.4.NBT.B.5

Bill and Alyssa helped pack books to donate to a charity. Bill packed 28 boxes with 30 books in each box. Alyssa packed 31 boxes with 25 books in each box. How many more books did Bill pack then Alyssa? Show your work on paper and type your answer below.

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CCSS.MATH.CONTENT.4.NBT.B.5

Write a multiplication equation to represent the model shown below. Show your work on notebook paper.

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CCSS.MATH.CONTENT.4.NBT.B.5