Are You Smarter Than a 5th Grader?

By: Lynn Scales

MathStandard: MCC4.OA.2Multiply 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

#1

Find the value of the underlined digit.

703,891 = ____________63,549 = ____________182,034 = ____________

Answer to #1

Find the value of the underlined digit.

703,891 = 700,00063,549 = 3,000182,034 = 100,000

#2

Sophia said that the expanded form for 605,970 is 600,000 + 50,000 +900 + 70. Explain Sophia’s error and give the correct answer.

Answer to #2

Sophia should have put 0 for the ten thousands instead of 50,000. So the correct answer should be:600,000 + 00,000 + 5,000 + 900 + 70 + 0 = 605,970.

#3The Smith family opens the door of their refrigerator 32 times in one day. There are 31 days in May. About how many times is it opened in May?

Answer to #3

The Smith family opens the door of their refrigerator 32 times in one day. There are 31 days in May. About how many times is it opened in May?

Answer = 900 times (remember to estimate when it says “about”)

#4 The bakery made 110 pumpkin muffins. They will be packed in boxes with 8 muffins in each box. About how many boxes will there be?

Answer to #4

The bakery made 110 pumpkin muffins. They will be packed in boxes with 8 muffins in each box. About how many boxes will there be?

Answer: 14 boxes

#5

A dolphin’s heart beats 688 times in 6 minutesAnswer: About 100 timesWhat’s the question?

Answer to #5

A dolphin’s heart beats 688 times in 6 minutesAnswer: About 100 timesWhat’s the question?

Answer: About how many times does a dolphin’s heart beat in one minute?

#6

About 300,000 people attend afestival. Which number could bethe exact number of people thatattended the festival?a. 389,001b. 351,213c. 282,348d. 249,849

C = 282,348

Answer to #6

About 300,000 people attend afestival. Which number could bethe exact number of people thatattended the festival?a. 389,001b. 351,213c. 282,348d. 249,849

#7The fraction models below are equivalent. Explain why.

Answer to #7

Answer = All the fractions are equivalent because they all cover half of the entire shape.

The fraction models below are equivalent. Explain why.

3/6 = 1/2 2/4 = 1/2 4/8 = 1/2

#8

Find the quotient of 1,280 and 7.

A. 182 R 5 B. 181 R 13 C. 182 R 6 D. 182 R 7

C = 182 R 6

Answer to #8

Find the quotient of 1,280 and 7.

A. 182 R 5 B. 181 R 13 C. 182 R 6 D. 182 R 7

#9

Find the product of 349 and 7.

A. 49 B. 2,443 C. 2, 433 D. 2,343

B = 2,443

Answer to #9

Find the product of 349 and 7.

A. 49 B. 2,443 C. 2, 433 D. 2,343

#10

B = $1.50

Answer to #10

#11

Answer to #11

H = 5:24

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