● addition, multiplication and division of integers

● representation of subtraction of integers through the use of a physical model, and of integer subtraction as an equivalent integer addition, and as the difference between integers

**Indices**

● calculation of squares and cubes of rational numbers

● mental computation of square roots of rational numbers associated with known perfect squares; for example,√(0.64) = 0.8 because 82 = 64; √(6.4) is not related to 8

● use of technology to confirm the results of operations with squares and square roots