5th Grade Unit 1 Math Practice Quiz

Adding 15 and 27 gives 42 because 15 + 27 equals 42. This basic addition problem confirms that 42 is the correct answer.

Dividing 36 by 6 yields 6 since 6 multiplied by 6 equals 36. This straightforward division confirms the correct answer is 6.

Multiplying the 3 groups by 4 apples per group gives 12 apples in total. This is a simple application of multiplication.

Subtracting 23 from 50 gives 27 because 50 - 23 equals 27. This basic subtraction confirms that 27 is the correct result.

Multiplying 7 by 8 gives 56. This straightforward multiplication confirms 56 as the correct answer.

To add fractions, a common denominator is needed. Converting 1/2 to 2/4 and adding 1/4 results in 3/4, which is the correct answer.

Reducing 4/8 by dividing both the numerator and the denominator by 4 results in 1/2. This simplified fraction confirms the correct equivalence.

The decimal 0.75 is equal to 75/100, which simplifies to 3/4 when both terms are divided by 25. Thus, 3/4 is the fraction in simplest form.

First, the expression inside the parentheses is evaluated: 3 + 2 equals 5. Multiplying 9 by 5 gives 45, which is the correct answer.

Subtracting 15 from 62 yields 47 because 62 - 15 equals 47. This confirms the correct answer using basic subtraction.

A prime number has exactly two distinct factors: 1 and itself. Since 29 is divisible only by 1 and 29, it is the prime number among the options.

The LCM of 4 and 6 is the smallest number that both 4 and 6 divide into evenly, which is 12. Listing the multiples confirms 12 as the least common multiple.

20% is the same as 0.20, and multiplying 50 by 0.20 gives 10. Thus, 10 is the correct percentage calculation.

First add 2 and 4 to obtain 6, then multiply by 3 to get 18, and finally subtract 5, resulting in 13. This follows the order of operations correctly.

The perimeter of a rectangle is calculated using the formula 2(length + width). For a rectangle with a length of 8 and a width of 3, 2(8+3) equals 22, which is correct.

The area of a rectangle is found by multiplying its length by its width. Multiplying 12 by 5 gives 60 square meters, which is the correct area.

In the ratio 3:5, 15 blue marbles implies a scale factor of 5 (since 15 divided by 3 equals 5). Multiplying the red part (5) by this factor gives 25 red marbles.

Subtracting 7 from both sides of the equation results in 2x = 14, and dividing both sides by 2 yields x = 7. This is the correct solution to the equation.

Dividing 120 pencils by 8 classrooms results in 15 pencils per classroom. This division evenly distributes the pencils, confirming 15 as the correct answer.

To determine the discount, calculate 20% of $15, which is 0.20 × 15 = $3.00. This shows that the discount amount is $3.00.