P4 Mathematics SA2 2020 — Henry Park | Singapore Past Year Paper

Q: The value of the digit 4 in 74 325 is ____.

C. 4000. In 74 325, the digit 4 is in the thousands place, so its value is 4 × 1000 = 4000.

Q: 34 856 rounded to the nearest hundred is ____.

B. 34 900. Look at the tens digit (5). Since it is 5 or more, round up. So 34 856 → 34 900.

Q: Which of the following is not an equivalent fraction of 1/4?

C. 4/12. 2/8 = 1/4, 3/12 = 1/4, 4/16 = 1/4, but 4/12 = 1/3. So 4/12 is not equivalent to 1/4.

Q: In the figure below, what is the length of the mechanical pencil in cm?

B. 9.7 cm. Reading the ruler, the pencil starts at 0 cm and ends at the 9.7 cm mark.

Q: Write 3 7/20 as a decimal.

C. 3.35. 7/20 = 35/100 = 0.35. So 3 7/20 = 3.35.

Q: In the figure, which two lines below are perpendicular?

D. CD and DE. From the figure, CD and DE meet at a right angle (90°), so these are perpendicular.

Q: The figure below is made up of three rectangles. Find the perimeter of the figure.

B. 46 cm. The figure is a U-shape. Perimeter = 13 + 10 + 4 + 6 + 5 + 6 + 4 + 10 = wait, recompute. Outside: bottom 13, left 10, top-left 4, down 6, across 5, up 6, top-right 4, right 10. Sum = 13+10+4+6+5+6+4+10. But by rearranging the indents, perimeter equals outer rectangle perimeter = 2×(13+10) = 46 cm.

Q: The line graph below shows the number of cakes sold in a bakery from Monday to Thursday. How many more cakes were sold on Tuesday than on Thursday?

C. 120. From the graph, Tuesday = 180 cakes and Thursday = 60 cakes. Difference = 180 − 60 = 120.

Q: There were 45 people in a meeting room. 2/5 of the people were men. How many women were there in the room?

C. 27. Fraction of women = 1 − 2/5 = 3/5. Number of women = 3/5 × 45 = 27.

Q: Four figures, A, B, C and D, are shown below. Which of the figure(s), A, B, C and/or D is/are symmetrical?

A. A only. Figure A (arrow) has a horizontal line of symmetry. Figure B (not-equal sign / two crossed bars) is not symmetrical. Figure C (parallelogram) has no line of symmetry. Figure D (irregular quadrilateral) is not symmetrical. Only A is symmetrical.

Q1 MCQ 2 marks

The value of the digit 4 in 74 325 is ____.

Q2 MCQ 2 marks

34 856 rounded to the nearest hundred is ____.

Q3 MCQ 2 marks

Which of the following is not an equivalent fraction of 1/4?

Q4 MCQ 2 marks 🖼 Visual

In the figure below, what is the length of the mechanical pencil in cm?

Q5 MCQ 2 marks

Write 3 7/20 as a decimal.

Q6 MCQ 2 marks 🖼 Visual

In the figure, which two lines below are perpendicular?

Q7 MCQ 2 marks 🖼 Visual

The figure below is made up of three rectangles. Find the perimeter of the figure.

Q8 MCQ 2 marks 🖼 Visual

The line graph below shows the number of cakes sold in a bakery from Monday to Thursday. How many more cakes were sold on Tuesday than on Thursday?

Q9 MCQ 2 marks

There were 45 people in a meeting room. 2/5 of the people were men. How many women were there in the room?

Q10 MCQ 2 marks 🖼 Visual

Four figures, A, B, C and D, are shown below. Which of the figure(s), A, B, C and/or D is/are symmetrical?

Q11 Open-ended 2 marks

Arrange the following numbers from the smallest to the greatest. 6904 , 6049 , 6490

Q12 Open-ended 2 marks

3754 + 1587 = ____

Q13 Open-ended 2 marks

What number is 10 more than 9998?

Q14 Open-ended 2 marks

Write 4 3/4 as an improper fraction.

Q15 Open-ended 2 marks

What is the value of 7/8 + 1/4? Express your answer as a mixed number.

Q16 Open-ended 2 marks

Find the value of 1 − 2/3 − 1/9.

Q17 Open-ended 2 marks

Find the value of 6.52 × 8.

Q18 Open-ended 2 marks 🖼 Visual

Write the decimal represented by A.

Q19 Open-ended 2 marks 🖼 Visual

In the figure, ABCD is a rectangle. Find the value of ∠x.

Q20 Structured 2 marks 🖼 Visual

Jacky drew a triangle, ABC, as shown below. a) Measure and write down the size of ∠ABC in the figure. b) Measure the length of AC. Round your answer to 1 decimal place.

Q21 Open-ended 2 marks 🖼 Visual

The graph below shows the number of stickers collected by 5 children. How many stickers did Ali, Carl and Eve collect altogether?

Q22 Open-ended 2 marks

Mr Tan had some oranges to be packed into 43 boxes. He packed 7 oranges into each box except for the last box. Given that Mr Tan packed only 2 oranges into the last box, how many oranges did Mr Tan have altogether?

Q23 Open-ended 2 marks

A box with 6 mangoes has a total mass of 7.44 kg. The mass of the box is 1.2 kg when empty. What is the mass of each mango in kilograms?

Q24 Structured 2 marks

Lina started school at 7.25 a.m. She had lessons till 1.15 p.m. After her lessons, she spent 2 h 45 min in the school library reading. After that, she left for home. a) How long did Lina spend having lessons in school? Express your answer in minutes. b) What time did Lina leave school for home?

Q25 Open-ended 2 marks 🖼 Visual

Ryan had a piece of wire 35 cm long. He bent the wire to form a rectangle of breadth 6 cm. He then had 5 cm of wire left. What was the length of the rectangle Ryan formed?

Q26 Structured 2 marks 🖼 Visual

a) Complete the figure below so that the dotted line XY is the line of symmetry. b) Shade one more square so that the figure below becomes symmetrical.

Q27 Structured 2 marks 🖼 Visual

Kate is now standing at Point X and facing the school. a) Which building will she face after making a 3/4-turn in the anti-clockwise direction? b) The MRT station is to the north of Point X. Which building is to the south-west of Point X?

Q28 Structured 2 marks

Nila travelled from Johor Bahru to Singapore by bus. The bus journey took 135 minutes. a) Express 135 minutes in hours and minutes. b) Given that Nila reached Singapore at 9 a.m., what time did the bus leave Johor Bahru?

Q29 Open-ended 2 marks

Teams A, B, C and D took turns to play a match against one another. Each team played only once with another team. How many matches did the 4 teams play altogether?

Q30 Open-ended 2 marks 🖼 Visual

The table below shows the number of pupils who chose to attend Math enrichment lessons from Monday to Friday. Each pupil could only choose one day. Given that 48 pupils chose to attend Math enrichment lessons on Thursday, find the total number of pupils who chose to attend Math enrichment lessons from Monday to Friday.

Q31 Open-ended 2 marks

George and Jane shared a sum of $152. George received 1/8 of the sum of money. How much money must Jane give to George so that they will have the same amount of money?

Q32 Open-ended 2 marks 🖼 Visual

Apples are sold at the prices shown below. Ali wants to buy 17 apples for a class party. What is the least amount of money he needs to pay for the apples?

Q33 Open-ended 2 marks

Jenny paid a total of $8.50 for 2 pens and 1 pencil. A pen cost $1.25 more than a pencil. How much did Jenny pay for one pen?

Q34 Open-ended 2 marks 🖼 Visual

Maria has some striped and dotted balls. Balls of the same pattern have the same mass. The scales below show the mass of the balls. What is the mass of one dotted ball?

Q35 Structured 2 marks 🖼 Visual

Figure Q is drawn by joining some dots on the square grid below with straight lines. In the same way, a) draw a rectangle with the same perimeter as Figure Q on the square grid below. b) draw a square with the same area as Figure Q on the square grid below.

Q36 Open-ended 3 marks

Suri mixed 17.47 ℓ of red paint and 15.29 ℓ of yellow paint in a big pail to get orange paint. She then poured the orange paint equally into 7 identical small tins. How many litres of orange paint were there in each small tin?

Q37 Open-ended 4 marks 🖼 Visual

A painting measures 35 cm by 23 cm. It is placed on a board that is 40 cm by 29 cm. What is the area of the board that is not covered by the painting?

Q38 Structured 4 marks

A stall holder uses 2.78 kg of rice each day. a) What is the total mass of rice the stall holder uses in a week? b) Rice is sold in 1-kg bags at $2 each bag. What is the least amount of money the stall holder will need to pay for the rice for the week?

Q39 Open-ended 4 marks 🖼 Visual

Philip had some identical square tiles of side 9 cm. He placed all the tiles side by side without any gaps in between each tile to form a rectangle of perimeter 792 cm as shown below. How many square tiles did Philip have?

Q40 Open-ended 4 marks

At first, Mei Mei had thrice as many tokens as Emma. After Mei Mei used 685 tokens in the morning and 979 tokens in the afternoon, Emma had thrice as many tokens as Mei Mei. How many tokens did Emma have?

Q41 Open-ended 4 marks

Bala and Ethan had a total of 800 marbles. Bala gave 105 marbles to Ethan. Ethan then gave 49 marbles to Bala. In the end, Bala has four times as many marbles as Ethan. How many marbles did Ethan have at first?

Q42 Open-ended 3 marks

Mrs Ling had 248 chicken pies and potato puffs for sale. After selling 150 chicken pies and 1/4 of the potato puffs, she had an equal number of chicken pies and potato puffs left. What is the total number of chicken pies and potato puffs Mrs Ling had left?

Q43 Open-ended 4 marks

Mandy placed all the boxes of cookies she had on 35 shelves. She placed the same number of boxes of cookies on each shelf. 5 of the shelves broke and the boxes of cookies on these shelves were placed on the remaining 30 shelves. In the end, the number of boxes of cookies on each remaining shelf increased by 3. How many boxes of cookies did Mandy have in total?

P4 Mathematics SA2 2020 — Henry Park

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