Curriculum placement
Grade 5. This describes the skill, not a learner estimate.
The four operations with decimals
Add subtract multiply and divide decimals through hundredths
Problem types
- Add decimals
- Multiply decimals
- Model decimal products and quotients with area
- Balance a budget
- Gross pay and net pay
- Connect decimal models to written methods
- Prices and counts for a group
- Gross pay and take-home pay
Builds on
- Decimal place value through thousandths
- Dividing by a two-digit number
- Money with decimals · Earlier idea
Adding and subtracting money through hundredths is the same place-value alignment used for other decimals.
- Adding and subtracting whole numbers · Earlier idea
Decimals are added and subtracted with the same place-value alignment and regrouping used for whole numbers.
- Regrouping within 1,000 · Earlier idea
Regrouping across tens and hundreds is the same move as regrouping when adding or subtracting decimals.
- Coins and bills · Useful idea
Dollars and cents are hundredths of a dollar. Adding money is adding decimals aligned by place.
- Add two-digit numbers · Earlier idea
Adding decimals lines up place values and regroups, exactly like adding two-digit numbers, with the decimal point staying in line.
Leads to
- Profit, cost, and taxes
- Converting within one measurement system
- Fluent decimal arithmetic
- Mean and median
- Mean of a data set
- Circumference and area of a circle
- Percent increase and decrease
- Median and spread of signed data
- Equivalent ratios · See it applied
A price times a count is a unit rate scaled to a quantity. A rate table scales one hourly price to any number of hours the same way.
Related skills
- Fluent whole-number division · Shared foundations
Open the interactive map to explore lessons and skill connections.