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Weighted average intuition
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First let's make sure you are comfortable with this construction.
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Weighted averages
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Calculate what weighting used in a weighted average of two points.
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Weighted subdivision
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Understanding what happens in subdivision with different weights
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Weighted average of three points
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Now it's your turn to prove you can calculate the weighted average. Later on we can let the computer do these calculations for us (phew!)
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Where did agriculture come from?
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Test your knowledge of early agriculture!
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Rollercoasters are energy at work!
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This passage will test your knowledge on work and energy
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Work and energy questions
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Questions pertaining to work and energy
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Writing equilibrium constant expressions
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Practice writing equilibrium constant expressions when given a balanced equation
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Write fractions as whole numbers
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Represent fractions as whole numbers and whole numbers as fractions.
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Your heart does work: A relationship of pressure and volume
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Questions related to PV diagrams
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Zeros of polynomials challenge problems
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Solve some more challenging problems that involve reasoning about the zeros of polynomials.
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Equivalent fraction models
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Identify and create equivalent fractions using visual models.
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Create rectangles with a given area
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Practice finding the area of rectangles by counting unit square. Create rectangles with a given area by covering unit squares.
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Measure to find area
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Practice measuring the side-lengths of a rectangle to find its area.
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Multiply by tens word problems
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Solve word problems with multiples of ten. Decompose multiples of ten to multiply.
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Multiplying 10s
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Practice multiplying 2-digit multiples of 10, such as 50x70=3500.
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Multiply with arrays
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Practice multiplying 1-digit numbers using arrays.
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Compare fractions of different wholes
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Compare two fractions based on the whole that each one refers to.
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Patterns in multiplication tables
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Practice discovering and explaining patterns in multiplication tables.
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Categorize quadrilaterals
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Classify and compare rectangles, rhombuses, and squares.
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