Curriculum placement
Grade 8. This describes the skill, not a learner estimate.
Approximating roots
Approximate roots and compare irrational values
Problem types
- Order and compare fractions, decimals, percents and roots
- Locate a root between whole numbers
- Square root to the nearest tenth
- Compare irrational numbers
- Solve square and cube equations
- Select the approximate values of marked points
- Select the numbers greater or less than a value
Builds on
- Telling rationals from irrationals
- Whole-number powers
- Comparing decimals to hundredths · Useful idea
Comparing the decimal approximations of two roots decides which is greater.
- Fractions on a number line · Useful idea
A square root is placed on the number line between two whole numbers by comparing its square with the squares of those whole numbers.
Leads to
Related skills
- Decimal place value through thousandths · Related idea
Rounding a decimal to the nearest tenth and reading a square root to the nearest tenth both ask which tenth mark is closest to a value.
- Circumference and area of a circle · Shared foundations
- Laws of exponents · Shared foundations
- Expressions with variables · Shared foundations
Open the interactive map to explore lessons and skill connections.