10 resources.
Quick tests to check whether a number is divisible by 2 through 12, with worked examples.
A quick-reference table of squares from 1 to 30 and cubes from 1 to 20.
Common percentage calculation shortcuts and mental math tricks with worked examples.
Practice questions on adding fractions and mixed numbers, with worked solutions.
What percentage means, how to compute a combined percentage across subjects, with a worked example.
What a ratio is and how to simplify one to its lowest terms, with a worked real-world example.
How to check whether four numbers are in proportion, and how to solve for a missing term, with worked examples.
How to calculate profit and loss percent, and work backwards from a selling price or discount to find the cost price, with worked examples.
The simple interest and compound interest formulas, why compound interest grows faster, and worked examples for both.
Five worked Math Olympiad-style problems for grade 7: a Fibonacci-like sequence, an exponent equation, percentages with overlap, consecutive integers, and clock arithmetic.