Primary 4 Maths Weighted Assessment 1 (WA1) – Test 2

1. Write the number. Seventy thousand, four hundred and twenty-six.

Answer:

📖 REMINDER: Break the number into parts: ten-thousands, thousands, hundreds, tens and ones. Pay attention to place value positions.

WA1,AIT,2024,Whole Numbers

2. Use all the digits below to form the smallest 4-digit number. 4 7 0 3

Answer:

📖 REMINDER: The smallest 4-digit number must start with the smallest non-zero digit, then arrange the remaining digits in ascending order.

WA1,AIT,2024,Whole Numbers

3. Complete the number pattern. 85 412, 84 412,     , 82 412, 81 412,   

📖 REMINDER: Look for the pattern in how the numbers change. Check the difference between consecutive terms to identify the rule.

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📖 REMINDER: Compare numbers digit by digit from the leftmost place value (ten-thousands) to the right. Numbers with the same digit in a place value move to the next digit for comparison.WA1,AIT,2024,Whole Numbers

5. 5a. Round 63 872 to the nearest ten.

Answer:

5b. Round 63 872 to the nearest hundred.

Answer:

📖 REMINDER: To round to the nearest ten, look at the ones digit. To round to the nearest hundred, look at the tens digit. If it's 5 or more, round up; if it's 4 or less, round down.

WA1,AIT,2024,Whole Numbers

6. Jenny listed the factors of 48 below.She missed out two factors.
1, 2, 3, 6, 8, 16, 24, 48

What are the missing factors ?

Answer: ,

📖 REMINDER: Factors come in pairs that multiply to give the number. List them systematically to find missing ones.

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7. A given number is a multiple of 14. The number is between 60 and 80. What is the number?

Answer:

📖 REMINDER: List the multiples of the given number within the specified range. Check if there's only one possible answer.

WA1,AIT,2024,Multiples

9. Find the value of   ¹³⁄₁₅ - ²⁄₅. Give your answer in its simplest form.

Answer:

📖 REMINDER: To subtract fractions, they must have the same denominator. Find the lowest common denominator first, then subtract the numerators.

WA1,AIT,2024,Fractions

10. A bakery had 128 trays of cupcakes. Each tray had 24 cupcakes.

(a) How many cupcakes were there?

Answer:

(b) The bakery sold 892 cupcakes. The rest of the cupcakes were packed into boxes of 8. How many boxes of cupcakes were packed?

Answer:   

📖 REMINDER: For part (a), multiply the number of trays by cupcakes per tray. For part (b), first subtract sold cupcakes from the total, then divide the remainder by cupcakes per box.

WA1,AIT,2024,Whole Numbers

11. Jenny had some stamps at first. She gave 187 stamps to her sister. Then she received 325 new stamps from her friend.
Jenny had 845 stamps in the end. How many stamps did she have at first?

Answer:

📖 REMINDER: Work backwards from the end. Start with the final amount, undo the last change first, then undo the first change.

WA1,AIT,2024,Whole Numbers

12. School X has 2,185 science books in its library. School Y has 3 times as many books as School X.

(a) How many more science books does School Y have than School X?

Answer:

(b) How many science books must be moved from School Y to School X so that there will be the same number of books in both schools?

Answer:

📖 REMINDER: For part (a), first find School Y's total books, then subtract School X's books. For part (b), find half of the difference between the two schools.

WA1,AIT,2024,Whole Numbers

13. A blue light flashes every 3 minutes, and a yellow light flashes every 5 minutes.

(a) How many times will the yellow light flash in 45 minutes?(b) The two lights flash together at 7:00 p.m. for the first time.
At what time will the two lights flash together for the second time?

Answer:

(b) The two lights flash together at 7:00 p.m. for the first time. At what time will the two lights flash together for the second time?

Answer:  pm

📖 REMINDER: For part (a), divide total time by flashing interval. For part (b), find the LCM of the intervals to determine when they sync again.

WA1,AIT,2024,Whole Numbers