Grade Eight
Strand:Numbers and Operations
Topic: Estimation and Mental Calculations    

Learning Objectives    Open this page in its own window

 problem 13 problem 5 problem 14

Problem Sets

N-9
reason out and solve problems by applying the following mental calculation strategies

  1. front end adding, subtracting, and multiplying 7.2 x 4 = ?
  2. adding, subtracting, or multiplying by chaining
  3. multiplying and dividing by forming aliquot parts
  4. adding/subtracting special fractions
  5. subtracting a mixed number from a whole number
  6. finding fractional parts of whole numbers

N-10
estimate a sum, a difference, a product, or a quotient by
  1. reformulating
  2. compensating
  3. translating

N-14
estimate the square root of any whole number
  1. less than 100

N-15
reason out and solve percent problems by applying the following mental calculation strategies
  1. using fractions to calculate percents
  2. using rules for conversion of percent to decimal and vice versa
  3. relating complex percents to more easily handled ones