Number sense

Number sense is the ability to understand, interpret, and work with numbers. It includes skills such as estimating, comparing, and performing calculations.

To compare decimal numbers, align the decimal points and compare digit by digit from left to right.

Factors are numbers that can be multiplied together to get another number. For example, the factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.

An equivalent fraction is a fraction that represents the same value as another fraction, even though the numerator and denominator are different.

To round a number to the nearest hundred, look at the tens digit. If it is 5 or more, round up; if it is 4 or less, round down.

The sum of the digits in a number is the total obtained by adding each digit together. For example, in the number 462, the sum is 4 + 6 + 2 = 12.

A mystery number problem provides clues to help identify a specific number based on given conditions.

An even number is any integer that is divisible by 2 without a remainder. Examples include 0, 2, 4, 6, and 8.

To find common factors, list all the factors of each number and identify the factors that appear in both lists.

Rounding is the process of adjusting the value of a number to make it simpler while keeping it close to the original value.