Factors, Multiples & Simplifying Calculations (Ex. 1)

What's in this exercise

Answers are hidden — sign up to practise and check your work.

1. Question 1

   Multiple choice

   To calculate 35 × 16, you could use: 35 × 8 × 2. What is 35 × 8?

2. Question 2

   Multiple choice

   Which pair of factors could you use to simplify 24 × 15?

3. Question 3

   Multiple choice

   Using multiples: 450 ÷ 9 = ? (hint: 9 × 50 = 450)

4. Question 4

   Sequence

   Use factors of 12 to simplify: 12 × 25 = (4 × 3) × 25 = 4 × (3 × 25) = 4 × 75 = ___.

5. Question 5

   True or false

   Knowing that 7 × 8 = 56 helps you quickly solve 70 × 80 = 5,600.

More exercises in this module

• Written Division with Remainders (Ex. 2)

• Written Division with Remainders (Ex. 1)

• Long Multiplication: 4-5 Digit × 2-Digit (Ex. 3)

• Written Division with Remainders (Ex. 3)

• Factors, Multiples & Simplifying Calculations (Ex. 3)

• Long Multiplication: 4-5 Digit × 2-Digit (Ex. 1)