O1 Number Sense Test Relearn

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. The acronym PEMDAS is often used: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is multiplication?

Back

Multiplication is one of the four basic arithmetic operations, representing the repeated addition of a number. For example, 3 x 4 means adding 3 four times (3 + 3 + 3 + 3 = 12).

Front

What is 20% of a number?

Back

20% of a number is calculated by multiplying the number by 0.20. For example, 20% of 60 is 60 x 0.20 = 12.

Front

How do you simplify a fraction?

Back

To simplify a fraction, divide both the numerator and the denominator by their greatest common divisor (GCD). For example, to simplify 6/8, divide both by 2 to get 3/4.

Front

What is the result of (2 + 7 - 1) ÷ 2²?

Back

The result is 2. First, calculate inside the parentheses: (2 + 7 - 1) = 8. Then, divide by 2² (which is 4): 8 ÷ 4 = 2.

Front

What is the product of 1/8 and 2/3?

Back

The product of 1/8 and 2/3 is 1/12. Multiply the numerators (1 x 2 = 2) and the denominators (8 x 3 = 24), then simplify: 2/24 = 1/12.

Front

What is the sum of 3/4 and 3/4?

Back

The sum of 3/4 and 3/4 is 3/2. When adding fractions with the same denominator, add the numerators: 3 + 3 = 6, so 6/4 simplifies to 3/2.

Front

What does it mean to divide a number by a power of 2?

Back

Dividing a number by a power of 2 means to halve the number repeatedly. For example, dividing by 2² (which is 4) means to take the number and divide it by 4.

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number). For example, 1/2 means one part out of two equal parts.

Front

What is the difference between addition and subtraction?

Back

Addition is the process of finding the total or sum by combining numbers, while subtraction is the process of finding the difference by taking one number away from another.