Decimal Models

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 0.5 is a decimal.

Place value refers to the value of a digit based on its position in a number. In the decimal number 3.14, the '3' is in the ones place, '1' is in the tenths place, and '4' is in the hundredths place.

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the answer directly below the other decimal points.

To subtract decimals, align the numbers by the decimal point, subtract as you would whole numbers, and place the decimal point in the answer directly below the other decimal points.

Multiplication of decimals involves multiplying the numbers as if they were whole numbers, then placing the decimal point in the product based on the total number of decimal places in the factors.

To divide decimals, you can convert the divisor to a whole number by moving the decimal point to the right, then move the decimal point in the dividend the same number of places and divide as usual.

0.8 + 0.74 = 1.54.

1.54 - 0.74 = 0.8.

Dividing means splitting a number into equal parts. For example, dividing 1.5 by 0.5 means finding how many times 0.5 fits into 1.5.

0.22 x 6 = 1.32.