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Compare Area And Perimeter Of Rectangles And Squares
Improve your math knowledge with free questions in "Compare area and perimeter of rectangles and squares" and thousands of other math skills.
Complete The Addition Sentence - Up To Three Digits
Improve your math knowledge with free questions in "Complete the addition sentence - up to three digits" and thousands of other math skills.
Comparison Word Problems - Up To 20
Improve your math knowledge with free questions in "Comparison word problems - up to 20" and thousands of other math skills.
Add Doubles Using Models
Improve your math knowledge with free questions in "Add doubles using models" and thousands of other math skills.
Write The Addition Or Subtraction Rule For An Input/output Table - Up To 20
Improve your math knowledge with free questions in "Write the addition or subtraction rule for an input/output table - up to 20" and thousands of other math skills.
Multiply Using Number Lines
Improve your math knowledge with free questions in "Multiply using number lines" and thousands of other math skills.
Write Numerical Expressions: Two Operations
Improve your math knowledge with free questions in "Write numerical expressions: two operations" and thousands of other math skills.
Addition Sentences For Word Problems - Sums To 20
Improve your math knowledge with free questions in "Addition sentences for word problems - sums to 20" and thousands of other math skills.
Subtract Doubles
Improve your math knowledge with free questions in "Subtract doubles" and thousands of other math skills.
Round To The Nearest Ten Or Hundred
Improve your math knowledge with free questions in "Round to the nearest ten or hundred" and thousands of other math skills.
Decompose Fractions
Improve your math knowledge with free questions in "Decompose fractions" and thousands of other math skills.
PhET: Calculus Grapher
Draw a graph of any function and see graphs of its integral, first derivative, and second derivative. Drag the tangent line along the curve, and accumulate area under the curve.
Two-step Addition And Subtraction Word Problems
Improve your math knowledge with free questions in "Two-step addition and subtraction word problems" and thousands of other math skills.
Divisibility Rules
Improve your math knowledge with free questions in "Divisibility rules" and thousands of other math skills.
Solutions To Inequalities
Improve your math knowledge with free questions in "Solutions to inequalities" and thousands of other math skills.
Understanding Decimals Expressed In Words
Improve your math knowledge with free questions in "Understanding decimals expressed in words" and thousands of other math skills.
PhET: Curve Fitting
Drag data points and their error bars and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, or cubic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.
Rounding Puzzles
Improve your math knowledge with free questions in "Rounding puzzles" and thousands of other math skills.