Find the value of each of the following. Give each answer in its simplest form.
- 34 - 25
- 49 ÷ 6
Need a hint?
For (a), find a number both 4 and 5 divide into. For (b), dividing by 6 is the same as multiplying by 16.
Worked answer
- (a) Write both fractions with the common denominator 20: 1520 - 820.
- (a) Subtract the numerators: 1520 - 820 = 720.
- (b) Write the division as a fraction: 49 ÷ 6 = 49 × 16.
- (b) Multiply the numerators and the denominators: 454.
- (b) Divide the numerator and denominator by 2 to simplify: 227.
Answer: 2/27
The mistake this question tests
Habit
Calculation slip
Pupils subtract the denominators as well as the numerators, or forget to simplify 454 to 227.
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