Kumon Math Achievement: Practice Quiz

Adding 47 and 28 gives 75 by combining tens and units appropriately. This basic addition reinforces foundational arithmetic skills.

Subtracting 47 from 93 yields 46. This problem tests basic subtraction, including regrouping where necessary.

Multiplying 8 by 7 gives 56, a fact that is essential in mastering multiplication tables. Clear recall of multiplication facts is beneficial for building further mathematical skills.

Dividing 81 by 9 results in 9 because 9 times 9 equals 81. This reinforces understanding of basic division facts.

When simplified, 2/4 reduces to 1/2 by dividing both the numerator and denominator by 2. This question checks the ability to simplify fractions.

Adding 125 and 375 results in 500. This problem helps strengthen multi-digit addition skills.

Subtracting 156 from 407 gives 251. This exercise focuses on subtraction with borrowing across digits.

Multiplying 15 by 12 results in 180 by breaking it into 15 x 10 and 15 x 2. This problem reinforces multiplication skills and mental computation.

Dividing 144 by 12 gives 12, as 12 multiplied by 12 equals 144. This reinforces division skills and number relationships.

Simplifying 8/12 by dividing the numerator and denominator by 4 gives 2/3. This tests the student's understanding of reducing fractions to simplest form.

The perimeter is calculated as 2 multiplied by the sum of the length and width: 2*(8+3) = 22. This problem applies the rectangle perimeter formula.

Adding fractions with the same denominator involves summing the numerators: 3+1, which equals 4, so the answer is 4/5. This reinforces the concept of combining like fractions.

If 3 slices are eaten from 8, then 5 slices remain. The fraction of the cake left is 5/8. This problem helps visualize part-to-whole relationships.

Dividing 3 by 4 converts the fraction to its decimal form, 0.75. This exercise promotes a better understanding of fraction-to-decimal conversions.

Among the options, 17 is the only prime number because it is divisible only by 1 and itself. This question encourages recognition of prime numbers.

First, add the numbers inside the parentheses: 4 + 6 = 10. Then multiply by 7 to get 70, and finally subtract 5 to arrive at 65.

The area of a triangle is calculated using the formula 1/2 * base * height. Here, 1/2 * 10 * 6 equals 30 cm².

Setting up the equation 2x + 8 = 24 and solving for x gives x = 8. This question integrates basic algebra into arithmetic operations.

The equation (1/3)x = 5 can be solved by multiplying both sides by 3, giving x = 15. This reinforces proportional reasoning.

Let the first even number be x; the next is x + 2. Setting up the equation x + (x + 2) = 46 gives x = 22, making the numbers 22 and 24. This question assesses problem-solving through simple algebra.