4MA0 Foundation June 2015 Paper 2R Q8

EdexcelFoundationOld spec3 marksUsing a Calculator / BIDMAS

8 Neha writes

\(4 + 9 \times 3 = 13 \times 3 = 39\)

Her teacher says that Neha has made a mistake.

(a) What mistake has Neha made? (1)

Neha is given two more calculations to do.
Her teacher says that Neha must show one stage of working and then the answer for each calculation.

(b) Complete the calculations showing one stage of working and the answer.

(i) \(24 \div 6 - 3 = \;\ldots\ldots\; = \;\ldots\ldots\)

(ii) \(45 \div (5 + 4) = \;\ldots\ldots\; = \;\ldots\ldots\)

(2)

Mark scheme (a)

Scheme	Marks
She should have multiplied 9 × 3 before adding 4	B1
	(1)

B1: Any reason that indicates the order of operations was wrong.
Accept 4 + 27 but not just 31
Accept “she forgot the brackets around 4 + 9” oe.