NumberKey Stage 3

Dividing by a decimal

Make a decimal divisor into a whole number.

  • Multiply both numbers by the same power of ten.
  • Choose the power that makes the divisor a whole number.
  • The quotient stays the same because both numbers scale equally.

Example 1

Calculate.

(6.72) over (0.8)=(67.2) over (8). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Example 2

Calculate.

(9.45) over (1.5)=(94.5) over (15). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Remember
The quotient stays the same because both numbers scale equally.

Your turn

Question 1

Calculate.

Check answer(6) over (1.5)=(60) over (15). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Question 2

Calculate.

Check answer(2.04) over (0.3)=(20.4) over (3). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Question 3

Calculate.

Check answer(3.24) over (0.3)=(32.4) over (3). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Question 4

Calculate.

Check answer(13.26) over (1.7)=(132.6) over (17). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

Question 5

Calculate.

Check answer(1.53) over (0.9)=(15.3) over (9). From fraction 1 to fraction 2, times 10 for both numerator and denominator.

Multiply both numbers by the same power of ten to make the divisor a whole number.

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