GCSE Secondary Maths Age 13-17 - Number: Types of Number and BODMAS - Explained

The video tutorial addresses common mathematical errors made by students. Jenny incorrectly solves an expression by not following the correct order of operations, known as BIDMAS, leading to a wrong answer. The correct approach is to perform multiplication before subtraction. Rehan makes a mistake in calculating the range of a set of numbers by subtracting the wrong values. The correct method involves subtracting the smallest number from the largest. Both examples highlight the importance of understanding and applying mathematical rules correctly.

What mistake did Jenny make in her calculation?

• She divided instead of multiplying.

• She subtracted before multiplying.

• She multiplied before subtracting.

• She added instead of subtracting.

According to BIDMAS, which operation should be performed first?

• Multiplication

• Subtraction

• Division

• Addition

What is the correct value of 12 minus 2 times 4?

• 40

• 8

• 4

• 10

What is the correct range of the numbers 3, 1, 8, 7, and 5?

• 2

• 5

• 7

• 3

What mistake did Rehan make in calculating the range?

• He used the wrong numbers for the range calculation.

• He multiplied the numbers instead of subtracting.

• He subtracted the first number from the last.

• He added the numbers instead of subtracting.