Test 3rd Grade Math Flashcards

Tina cut little rectangles out of a large piece of plastic cover. The area of each little rectangle is the same. Each small rectangle is 1/8 the size of the giant rectangle. Tina cut the large piece of material into how many small rectangles?

Answer: 8

If each small rectangle is 1/8 the size of the giant rectangle, it means that the giant rectangle can be perfectly divided into 8 equal parts. Each of these parts represents one of the small rectangles. Therefore, Tina cut the large piece of material into 8 small rectangles.

Mr. Kevin bought 5 Liters of gasoline and poured haf of it into his motorcycle tank. How much gasoline was left?

Answer: 2.5L

Mr. Kevin started with 5 liters of gasoline. He then poured 'half of it' into his motorcycle tank. To find half of 5 liters, you perform the calculation 5 ÷ 2. This results in 2.5 liters, which is the amount of gasoline left.

The expression below was written by Crissa. (1 x 3) + (3 x 5) Which of the following is a different method to show Crissa's expression?

Answer: 9x2

To find a different method to show Crissa's expression, first calculate the value of her expression: (1 x 3) + (3 x 5) = 3 + 15 = 18. Next, evaluate each answer choice to see which one also equals 18. Option C, 9x2, correctly equals 18, making it an equivalent expression.

What is the missing fraction in the number line?

Answer: 4/8

The number line shows fractions with a common denominator of 8, increasing sequentially. Starting from 0/8, the fractions progress as 1/8, 2/8, 3/8. Following this pattern, the missing fraction must be 4/8, which comes before 5/8.

What is 731 rounded to the nearest hundred?

Answer: 700

To round 731 to the nearest hundred, look at the tens digit. The tens digit is 3. Since 3 is less than 5, we round down, meaning the hundreds digit (7) stays the same, and all digits to its right become zero. Therefore, 731 rounded to the nearest hundred is 700.

Each month has 30 days: April, June, September, and November. How many days are there in total in the four months?

Answer: 120

The problem states that four specific months (April, June, September, and November) each have 30 days. To find the total number of days, you need to multiply the number of months by the number of days in each month. So, 4 months * 30 days/month equals 120 days in total.

John utilized the X forms to completely fill the figure below, leaving no gaps or overlaps. What fraction of the figure does one of the labeled shapes occupy?

Answer: 1/3

The figure is completely filled by three identical 'X' forms, with no gaps or overlaps. This means the figure is divided into three equal parts. Therefore, one of these identical shapes occupies one-third (1/3) of the entire figure.

What is the rectangle's perimeter in centimeters? L = 8 W = 3

Answer: 22 cm

The perimeter of a rectangle is calculated using the formula P = 2 * (Length + Width). Given the length (L) is 8 cm and the width (W) is 3 cm, substitute these values into the formula. P = 2 * (8 cm + 3 cm) = 2 * 11 cm = 22 cm.

Which of these patterns has an odd number as the next number?

Answer: 23,27,31,35,...

To find the pattern with an odd number as the next term, identify the rule for each sequence. For option C (23, 27, 31, 35,...), the pattern is adding 4 to the previous number. Following this rule, 35 + 4 = 39, which is an odd number.