3rd Grade Math Trivia: Ultimate Quiz

The best estimate for 47 + 39 would be 90. This is because when estimating, we can round both numbers to the nearest tens place. 47 can be rounded down to 40, and 39 can be rounded up to 40. Adding these rounded numbers together gives us 80, which is closest to the answer of 90.

To find the number that multiplied by 7 equals 84, we need to divide 84 by 7. By doing this calculation, we get the answer of 12. Therefore, the number that multiplied by 7 equals 84 is 12.

The given division fact, "20 Divided By 4 = 5," is one of the two possible best division facts for the multiplication equation 4 x 5 = 20. This is because when we divide 20 by 4, we get the quotient 5, which is the other factor in the multiplication equation.

To find the largest 4-digit number, we need to place the highest value digit in the thousands place. Since the highest value digit is 8, we place it in the thousands place. Then, we arrange the remaining digits (4, 7, and 8) in descending order to get the largest possible number. Therefore, the largest 4-digit number we can make is 8,874.

The factors of a number are the numbers that divide evenly into that number without leaving a remainder. In this case, the number 8 can be divided evenly by 1, 2, 4, and 8. Therefore, the factors of 8 are 1, 2, 4, and 8.

A newborn baby typically weighs around 8 pounds. This is considered to be a healthy and average weight for a newborn. Babies can vary in weight, but 8 pounds is a common range.

The factors of a number are the numbers that can evenly divide into that number without leaving a remainder. In this case, the factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. These numbers can all divide into 30 without leaving a remainder.

The correct answer is 3-Feb because when you add 1/3 and 1/3, you get 2/3. The numerator stays the same, but the denominator doubles. So, 2/3 can be written as 2 divided by 3, which is equal to 0.666... When converted to a date format, this is equivalent to February 3rd.

To make 19 cents using the least amount of coins, you can use 1 dime, 1 nickel, and 4 pennies. This combination adds up to 10 cents (1 dime), 5 cents (1 nickel), and 4 cents (4 pennies), which totals 19 cents.

The answer "22-Jun" is incorrect and does not provide a valid explanation. The question asks for the probability of choosing a red marble from a jar that contains 4 blue, 12 yellow, and 6 red marbles. To find the probability, we need to divide the number of red marbles by the total number of marbles in the jar. Therefore, the correct answer should be 6 (the number of red marbles) divided by 22 (the total number of marbles in the jar), which equals 6/22 or 3/11.

When 4869 is divided by 39, the remainder is 33. This can be calculated by dividing 4869 by 39, which equals 124 with a remainder of 33.

The perimeter of a rectangle is calculated by adding up all the sides. In this case, the length of the rectangle is 10 feet and the width is 5 feet. To find the perimeter, we add up the lengths of all four sides, which are two lengths and two widths. So, the perimeter is 10 + 10 + 5 + 5 = 30 feet.

To find what must be added to 3/5 in order to get 1, we need to subtract 3/5 from 1. This can be done by finding a common denominator for both fractions, which in this case is 5. So, 1 can be written as 5/5. Subtracting 3/5 from 5/5 gives us 2/5. Therefore, 2/5 must be added to 3/5 in order to get 1.

Division by zero is undefined in mathematics. When dividing a number by zero, there is no possible value that can be assigned to the result. It violates the fundamental rules of arithmetic and leads to contradictions. Therefore, the correct answer is undefined.