Question 1

Which calculation and type of division does this drawing illustrate?

Accepted Answer

A)  4 $\frac { 1 } { 2 }$÷ 3, sharing equally 
B)  4 $\frac { 1 } { 2 }$÷ 3, repeated subtraction 
C)  4 $\frac { 1 } { 2 }$• 3, repeated addition

Question 2

Felisha was asked to find 413 - 248. Here is how she did this problem: $\begin{array} { r } 
413 \
\underline{- 248 }\
 - 5 \
- 30 \
\underline{ 200 }\
165 
\end{array}$ 
Is her answer correct? Explain what she was doing. Find 9456 - 3789 using this method.

Accepted Answer

The answer of Felisha was asked to find 413 -...

Question 3

Zenaida is asked to add 428 and 686 in vertical form. She begins by saying, "Six thousand plus four thousand..." The interviewer then asks her what column the six and four are in, and she identifies it as the hundreds column. She begins again by saying, "Four hundred plus six hundred is ten hundred," and writes 110 below the line. She then says we have to do tens. She does 20 plus 80 equals 100 and places that under the 110. She then adds 8 and 6 and writes 14 and then writes that below the 100. Adding, she says it is 224. Where does Zenaida go wrong? Discuss her place value understanding.

Accepted Answer

The answer of Zenaida is asked to add 428 and...

Question 4

The large rectangle is divided into two smaller rectangles. Write a number sentence involving multiplication that shows that the area of the large rectangle is equal to the sum of the areas of the two smaller rectangles.

Accepted Answer

The answer of The large rectangle is divided into two...

Question 5

In a board game, a murder occurs. There are six possible suspects (Plum, White, Green, Mustard, Peacock, Scarlet), six possible weapons (candlestick, knife, lead pipe, revolver, rope, wrench), and nine possible rooms where the murder can take place. At the beginning of the game, three cards are chosen at random (one suspect, one weapon, one room).
A) How many different ways can these three cards be chosen?
B) If the game maker decided to add another possible suspect, Orange, to cover all the colors in the rainbow, how many more possibilities are there?

Accepted Answer

The answer of In a board game, a murder occurs....

Question 6

A) Can the following word problem be solved by 16 × 1/2?
B) Does the word problem illustrate a situation involving 16 halves or half of 16? 
Word problem: Don has sixteen one-half dollars. How much money does Don have?

Accepted Answer

The answer of A) Can the following word problem be...

Exam 3: Understanding Whole Number Operations

Which calculation and type of division does this drawing illustrate? $Which calculation and type of division does this drawing illustrate? A) 4 \frac { 1 } { 2 } ÷ 3, sharing equally B) 4 \frac { 1 } { 2 } ÷ 3, repeated subtraction C) 4 \frac { 1 } { 2 } • 3, repeated addition$

Felisha was asked to find 413 - 248. Here is how she did this problem: $\begin{array} { r } 413 \\\underline{- 248 }\\ - 5 \\- 30 \\\underline{ 200 }\\165 \end{array}$ Is her answer correct? Explain what she was doing. Find 9456 - 3789 using this method.

The large rectangle is divided into two smaller rectangles. Write a number sentence involving multiplication that shows that the area of the large rectangle is equal to the sum of the areas of the two smaller rectangles.

A) Can the following word problem be solved by 16 × 1/2? B) Does the word problem illustrate a situation involving 16 halves or half of 16? Word problem: Don has sixteen one-half dollars. How much money does Don have?