Add three or more decimals

Learning Objectives Line up three or more decimal numbers vertically by their decimal points. Add placeholder zeros to make decimal numbers have the same number of places. Add columns of digits from right to left, including regrouping (carrying over). Correctly place the decimal point in the final sum. Solve word problems that involve adding three or more decimal numbers, such as calculating the total cost of items. You're at the store and want to buy a candy bar for $1.25, a juice for $2.10, and a bag of chips for $0.95. How do you find the total cost? 🛒 In this lesson, we will learn a special way to add numbers with decimal points, just like adding up money! This skill is super useful for when you need to add several prices or measurements together to find a total. R...

TermDefinitionExample DecimalA number that has a whole number part and a fraction part, separated by a decimal point. Think of it like dollars and cents.In the number 3.45, '3' is the whole number part and '.45' is the fraction part. Decimal PointThe dot in a decimal number. Its job is to separate the whole numbers (like dollars) from the parts of a whole (like cents).In $5.25, the dot between the 5 and the 2 is the decimal point. Tenths PlaceThe first place to the right of the decimal point. It represents parts of ten. Think of it as dimes.In 1.6, the '6' is in the tenths place. It means 6 tenths, like 6 dimes or $0.60. Hundredths PlaceThe second place to the right of the decimal point. It represents parts of one hundred. Think of it as pennies.In 4.72, the...

The Line-Up Rule \begin{array}{c} \phantom{0}A.BC \\ \phantom{0}D.EF \\ +G.HI \\ \hline \end{array} When adding decimals, you must stack the numbers so that the decimal points are in a straight, vertical line. This makes sure you are adding tenths to tenths and hundredths to hundredths. The Placeholder Zero Rule A.B = A.B0 If numbers have a different amount of decimal places, you can add zeros to the end of the shorter numbers. This helps keep your columns neat and prevents mistakes.