Chapter 7 Decimals

  • Chapter 7

    Chapter Objective:

    * Decimals are another way to show amounts that are parts of a whole. A decimal has a decimal point to the right of the ones place and digits to the right of the decimal point.


    Tenth - one part out of ten.

    Decimal form - 1 tenth written in decimal form is  0.1

    Decimal point - A dot separating the ones and tenths places in a decimal number.

    Expanded form - The expanded form of a number shows the number as the sum of the values of its digits. It is a way to write numbers that shows the place value of each digit. Ex: 1 + 0.4 + 0.06 is the expanded form of 1.46

    Hundredth - One part out of a hundred.

    Placeholder zero - Decimals can have placeholder zeros. In 0.90 the digit zero in the ones place and the digit zero in the hundredths place are placeholder zeros.

    More than - 0.7 is 0.1 more than 0.6

    Less than - 1.5 is 0.1 less than 1.6

    Greater than - 0.4 is greater than 0.34

    Least - The smallest

    Greatest - The largest, the biggest

    Order - To order a set of numbers is to arrange them in a sequence following a set of rules.

    Round (in decimals) - To express a decimal to the nearest whole number, tenth, hundredth, and so on.

    Equivalent fraction - Fractions that have the same value. Ex: 1/2 = 5/10