Gr 8 (Decimals)

Key Topics and Skills:

Operations:

Addition, subtraction, multiplication, division

Squares, cubes, square roots, cube roots

Calculations:

Place value estimation

Rounding off

Calculator use

Problem-solving:

Percentages

Comparing and ordering

DECIMAL FRACTIONS 

Calculations with decimal fractions

• Multiplication of decimal fractions by decimal fractions not limited to one decimal place

• Division of decimal fractions by decimal fractions

• Calculate the squares, cubes, square roots and cube roots of decimal fractions

Calculation techniques

• Use knowledge of place value to estimate the number of decimal places in the result before performing calculations

• Use rounding off and a calculator to check results where appropriate

Solving problems

• Solve problems in contexts involving percentages

• Compare and order decimal fractions 

• Rounding off decimal fractions 

• Addition and subtraction of decimal

• Fractions of at least three decimal places

• Multiplication of decimal fractions by whole numbers and decimals 

• Division of decimal fractions by whole numbers

• Use knowledge of Place value to estimate the number of decimal places in the result before performing calculations

• Use rounding off and a calculator to check results where appropriate