STAAR Practice Test (Grade 3: Mathematics) Flashcards

Which of the statements about the number 24,589 is true?

Answer: The sum of twenty thousands, 4 thousands, fifty hundreds, eighty tens, and nine ones

Correct answer: The sum of twenty thousands, 4 thousands, fifty hundreds, eighty tens, and nine ones 24,589 is the sum of 20,000;4,000;500;80; and 9

In the box below, there are six numbers. From the numbers in the box, which of the following lists shows exclusively odd numbers?

Answer: 15, 29, 83

Correct answer: 15, 29, 83 Letter D consist odd numbers.

Which of the four numbers given would appropriately complete both of the number phrases below? ___ x 6 = 30 30 ÷ 6 = ____

Answer: 5

Correct answer: 5 5 x 6 = 30 is equivalent to 30 ÷ 6 = 5 because 5 groups of 6 objects is equivalent to 30.

In what area of the rectangle is the rectangle filled in?

Answer: 5/8

Correct answer: 5/8 Area is the amount of space within the perimeter of a two-dimensional shape. The rectangle is split into 8 pieces and 5 of those pieces are filled in. 5/8 of the area of this rectangle is filled in.

In the following equation, what is the value of "A"? 21+𝐴+9=44

Answer: 14

To find the value of 'A', first combine the known numbers on the left side of the equation: 21 + 9 equals 30. The equation then becomes 30 + A = 44. To isolate 'A', subtract 30 from both sides of the equation: 44 - 30 = 14. Therefore, A equals 14.

Yen wants to save $140 so she can buy her favorite bike. - She was able to save $36 in January. - She put aside $28 in February. In March, how much money does Yen need to save in order to buy her favorite bike?

Answer: $76

First, calculate the total amount of money Yen has saved so far by adding her savings from January and February: $36 + $28 = $64. Next, subtract this total saved amount from her goal of $140 to find out how much more she needs. So, $140 - $64 = $76. Yen needs to save an additional $76 in March.

What is the name of the dotted line that splits a shape into two equal parts?

Answer: a line of symmetry

A line of symmetry is a geometric concept where a line divides a shape or object into two identical, mirror-image halves. If you fold the shape along this line, the two halves would perfectly overlap. This property is fundamental in understanding balance and reflection in geometry.

In what area of the rectangle is filled in?

Answer: 2/6

To represent the filled area as a fraction, count the number of shaded parts, which is the numerator, and the total number of equal parts in the rectangle, which is the denominator. If two parts are shaded out of a total of six equal parts, the fraction representing the filled area is 2/6.

Mr. Jay eats four meals a day on average. In a week, how many meals does he consume?

Answer: 28

To find the total number of meals Mr. Jay consumes in a week, multiply the number of meals he eats per day by the number of days in a week. Since he eats 4 meals a day and there are 7 days in a week, the calculation is 4 meals/day * 7 days/week = 28 meals. Thus, he consumes 28 meals in a week.

Lj owns 72 vintage books. She intends to take them all to their local library. Which of the following equations may be used to determine the number of boxes she will use if she places the books in boxes that can accommodate 9 books?

Answer: 72 ÷ 9 = _____

To determine the number of boxes needed when dividing a total quantity into equal groups, the operation of division is used. Lj has 72 books in total, and each box can hold 9 books. Therefore, the equation 72 ÷ 9 = _____ correctly represents how to find the number of boxes she will use.

Kim started eating her dinner at 7:11 p.m. and finished at 7:35 p.m. so she could go play in her room. Kim, how long did it take you to finish your dinner?

Answer: 24 minutes

To calculate the duration Kim spent eating dinner, subtract the start time from the end time. Kim started at 7:11 p.m. and finished at 7:35 p.m. Since both times are within the same hour, simply subtract the minutes: 35 minutes - 11 minutes = 24 minutes. So, Kim took 24 minutes to finish her dinner.

In what area of the rectangle is filled in?

Answer: 7/12

To represent the filled area as a fraction, count the number of shaded parts, which is the numerator, and the total number of equal parts in the rectangle, which is the denominator. If seven parts are shaded out of a total of twelve equal parts, the fraction representing the filled area is 7/12.

In the equation 72÷𝐴=8, what is the value of A?

Answer: 9

To find the value of 'A' in the equation 72 ÷ A = 8, you need to determine what number divides 72 to result in 8. This can be solved by dividing the dividend (72) by the quotient (8). So, 72 ÷ 8 = 9. Therefore, the value of A is 9.

Angelie had a total of 983 cards. Then she delivered 349 of the cards to Yassi, one of her friends. Angelie lost 260 cards after that. Which equation can be used to calculate Angelie's current card count?

Answer: 983 – 349 – 260 = _____

Angelie starts with 983 cards. When she delivers 349 cards, her total decreases, so this is a subtraction. When she loses 260 cards, her total decreases again, which is another subtraction. Therefore, the correct equation to find her current card count is 983 – 349 – 260 = _____.

Outside, two classes of fifth grade pupils are lined up. Three rows of seven students make up one class. The other class is arranged in four rows of five. What is the total number of fifth graders lined up outside?

Answer: 41 fifth graders

First, calculate the number of students in each class. The first class has 3 rows of 7 students, totaling 3 * 7 = 21 students. The second class has 4 rows of 5 students, totaling 4 * 5 = 20 students. To find the total number of fifth graders, add the students from both classes: 21 + 20 = 41 students. Therefore, there are 41 fifth graders lined up outside.

Rhoda is conducting research for a science project. How much water will she have if she adds 14 additional grams of water to the scale below?

Answer: 29g

To find the total amount of water Rhoda will have, you need to add the initial amount of water shown on the scale to the additional amount she adds. Assuming the scale initially shows 15g of water, adding 14g more results in a total of 15g + 14g = 29g. Therefore, she will have 29g of water.

Which of the following statements regarding the models is correct?

Answer: Each shows a different fraction because they both have 3 shaded sections but a different number of total sections.

Fractions represent parts of a whole, and their value depends on both the number of shaded parts (numerator) and the total number of equal parts (denominator). Even if two models have the same number of shaded sections, they represent different fractions if the total number of equal sections in each model is different. Thus, different denominators mean different fractions, even with the same numerator count.

The following rectangle has a length of 7 centimeters and a width of 3 centimeters. What is the rectangle's area?

Answer: 21 𝑐𝑚²

The area of a rectangle is calculated by multiplying its length by its width. Given a length of 7 centimeters and a width of 3 centimeters, the area is 7 cm * 3 cm = 21 cm². Area is always expressed in square units, so the answer is 21 cm².

The sum of two numbers is 756. The number 356 is one of them. What's the other number?

Answer: 400

To find the other number, subtract the known number from the given sum. The sum of the two numbers is 756, and one of the numbers is 356. Therefore, the other number is 756 - 356 = 400.

Jing is conducting research for a science project. She must divide the water in the beaker below evenly into three smaller beakers. How much water will each beaker contain?

Answer: 12g

To determine how much water each smaller beaker will contain, divide the total amount of water by the number of beakers. Assuming the beaker initially contains 36g of water, and it needs to be divided evenly into three smaller beakers, each beaker will contain 36g ÷ 3 = 12g of water.