Decimal Operations (+, โ, ร, รท) Practice Problems & Line-Up Rules
Master decimal arithmetic including vertical addition, subtraction with regrouping, multiplication decimal hop counting, and long division with shifted decimal points.
๐ง Core Problem-Solving Strategies
๐ Line Up the Decimal Point (Addition & Subtraction)
Always align numbers strictly by their decimal point and pad missing trailing places with zeros (e.g. 4.5 + 2.18 = 4.50 + 2.18 = 6.68).
๐ฆ Total Decimal Hop Count (Multiplication)
Multiply as if whole numbers, then count the total decimal places in both factors and move the decimal point left that many places (0.4 ร 0.08: 4 ร 8 = 32, 1 + 2 = 3 hops โ 0.032).
โก๏ธ Divisor Whole Number Shift (Division)
Shift the decimal point of the divisor to make it a whole number, shift the dividend by the exact same number of places, and place the decimal straight up in the quotient.
โ Frequently Asked Questions
Do you line up decimal points when multiplying decimals?
NO. Only line up decimal points for addition and subtraction. For multiplication, right-align the numbers, multiply normally, and count total decimal digits at the end.
How do you divide a decimal by another decimal?
Multiply both divisor and dividend by 10, 100, etc. until the divisor is a whole number (e.g. 14.4 รท 1.2 = 144 รท 12 = 12).
Continue Learning & Practicing
Reinforce your understanding with printable worksheets, step-by-step guides, calculators, and speed games: