Number sense

Number sense is the ability to understand, interpret, and work with numbers. It includes skills such as estimating, rounding, and recognizing numerical relationships.

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

The value of a digit in a number depends on its position. For example, in the number 350,423, the digit 5 is in the ten-thousands place, so its value is 50,000.

The place value of the digit 3 in the number 350,423 is 300,000, as it is in the hundred-thousands place.

The expanded form of a number expresses it as the sum of the values of its digits. For example, the expanded form of 125 is 100 + 20 + 5.

To identify the value of a digit in a multi-digit number, determine its position (place value) and multiply the digit by the value of that position.

A digit is a single symbol used to represent numbers (0-9), while a number is a combination of digits that represents a quantity.

The digit in the ones place represents the number of single units in a number. For example, in 1,362, the digit 2 is in the ones place.

To convert a number into its word form, write out the number using words. For example, 1,362 is written as 'one thousand three hundred sixty-two'.

The value of the digit 2 in the number 1,362 is 60, as it is in the tens place.