BIDMAS - Worksheets, Questions and Revision

21 original exam-style questions - 4 pages of questions with a full mark scheme - free printable PDF.

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1.10 BIDMAS

EDEXCEL 1MA1 · Calculator allowed · about 50 minutes

Total Marks

Name: _______________________________ Date: ____ / ____ / ______

Answer ALL questions. Show all your working.

Work out 5 + 2 x 3

(Total for Question 1 is 1 mark)

Work out 20 - 4 x 3

(Total for Question 2 is 1 mark)

Work out (6 + 4) x 3

(Total for Question 3 is 1 mark)

Work out 3² + 4

(Total for Question 4 is 1 mark)

Circle the correct value of 6 + 2 x 5

A) 40
B) 16
C) 60
D) 22

(Total for Question 5 is 1 mark)

Work out 6 x (5 - 2)

(Total for Question 6 is 1 mark)

Work out (8 + 12) / 4

(Total for Question 7 is 1 mark)

Insert one pair of brackets into 2 + 3 x 4 to make the calculation equal to 20.

(Total for Question 8 is 1 mark)

Work out 4² - 3 x 2

(Total for Question 9 is 2 marks)

Priya buys 3 pens costing 45p each and one notebook costing 1.20 pounds. Work out the total cost of Priya's shopping.

(Total for Question 10 is 2 marks)

Work out 10 - (3 + 2) x 2

(Total for Question 11 is 2 marks)

Amara types 6 + 4 x 2 into her calculator and gets an answer of 20.

(a)Explain the mistake Amara has made.(1)

(b)Work out the correct answer to 6 + 4 x 2(2)

(Total for Question 12 is 3 marks)

Work out 3 x 2³

(Total for Question 13 is 2 marks)

Work out (7 - 2) x (9 - 6)

(Total for Question 14 is 2 marks)

Work out 50 / (2 + 3) - 4

(Total for Question 15 is 2 marks)

Work out 2 x 3² - (4 + 1)

(Total for Question 16 is 3 marks)

Work out (5 + 3)² / 4 x 2

(Total for Question 17 is 3 marks)

Work out 100 - 2 x (15 - 4²)

(Total for Question 18 is 3 marks)

Insert one pair of brackets into 3 + 5 x 2 - 1 to make the calculation equal to 15.

(Total for Question 19 is 2 marks)

A gym charges a joining fee of 15 pounds plus 8 pounds for every month of membership.

(a)Write an expression for the total cost, in pounds, of n months of membership.(1)

(b)Use your expression to work out the total cost of 6 months of membership.(2)

(Total for Question 20 is 3 marks)

Show that 2 + 3 x (7 - 4)² - 5 = 24

(Total for Question 21 is 3 marks)

Mark scheme · 1.10 BIDMAS

Question 1

B1 11 cao
Answer: 11

Question 2

B1 8 cao
Answer: 8

Question 3

B1 30 cao
Answer: 30

Question 4

B1 13 cao
Answer: 13

Question 5

B1 B (16) cao
Answer: B) 16

Question 6

B1 18 cao
Answer: 18

Question 7

B1 5 cao
Answer: 5

Question 8

B1 (2 + 3) x 4 written, oe
Answer: (2 + 3) x 4

Question 9

M1 4² = 16 and 3 x 2 = 6 both evaluated
A1 10 cao
Answer: 10

Question 10

M1 3 x 0.45 (= 1.35) seen, or equivalent method combining the pen cost correctly before adding the notebook
A1 2.55 pounds cao (accept 2 pounds 55p, ft from a correct method with one arithmetic slip)
Answer: 2.55 pounds

Question 11

M1 3 + 2 = 5 and 5 x 2 = 10 seen
A1 0 cao
Answer: 0

Question 12

(a) B1 correct reference to the order of operations, e.g. she added 6 + 4 first instead of doing the multiplication first, oe
(a) Answer: Amara added 6 + 4 = 10 before multiplying by 2, but multiplication must be done before addition
(b) M1 4 x 2 = 8 seen
(b) A1 14 cao
(b) Answer: 14

Question 13

M1 2³ = 8 seen
A1 24 cao
Answer: 24

Question 14

M1 7 - 2 = 5 and 9 - 6 = 3 both evaluated
A1 15 cao
Answer: 15

Question 15

M1 2 + 3 = 5 and 50 / 5 = 10 seen
A1 6 cao
Answer: 6

Question 16

M1 3² = 9 and 4 + 1 = 5 both evaluated
M1 2 x 9 (= 18) seen
A1 13 cao
Answer: 13

Question 17

M1 5 + 3 = 8 and 8² = 64 both evaluated
M1 64 / 4 (= 16) seen
A1 32 cao
Answer: 32

Question 18

M1 4² = 16 and 15 - 16 = -1 both evaluated
M1 2 x (-1) (= -2) seen
A1 102 cao
Answer: 102

Question 19

M1 correct trial of a bracket placement shown, e.g. (3 + 5) x 2 - 1
A1 (3 + 5) x 2 - 1 written, oe, cao
Answer: (3 + 5) x 2 - 1

Question 20

(a) B1 15 + 8n oe
(a) Answer: 15 + 8n
(b) M1 8 x 6 (= 48) seen, or correct substitution of n = 6 into a correct expression (ft from part a)
(b) A1 63 pounds cao
(b) Answer: 63 pounds

Question 21

M1 7 - 4 = 3 and 3² = 9 both evaluated
M1 3 x 9 (= 27) seen
A1 2 + 27 - 5 = 24 shown, cso
Answer: 24 (shown)

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BIDMAS - Worksheets, Questions and Revision

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1.10 BIDMAS

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Question 12

Question 13

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Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

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Question 2

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Question 9

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Question 11

Question 12

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Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21