### Interactive Worksheets

**Percentage increase and decrease - Level 7-8**

**Percentage of quantity - conversion % <-> decimal**

**Percentage of quantities**

**Basic operations with fractions.**

**Directed numbers - Level 4**

**Equivalent fractions, simplifying fractions, adding/subtracting fractions.**

**Fraction of a quantity**

**Rounding to significant figures**

**Rounding to decimal places**

**Rounding to the nearest 10,100,1000 and estimating sums**

**Multiplying and dividing by powers of ten**

**Sequences**

**Converting improper fractions and mixed numbers**

**Ratios**

**Proportions**

**Basic operations (add, subtract, multiply and divide)**

**Pythagoras theorem**

**Operations with fractions**

**Negative numbers, +, -, × , ÷**

**Operations with negative numbers**

**Index notations and the rules of operations.**