C on t en t s 2 A
Exercise Topic Dimension Page
1 3-digit Numbers Number 2
2 Counting in Groups of 50 or 100 Number 4
3 Addition (1) Number 6
4 Addition (2) Number 8
5 Metres and Centimetres Measures 10
6 Angles and Right Angles Shape and Space 12
Test 1 (Exercises 1 – 6) 14
7 Subtraction Number 18
8 Prisms, Cylinders, Pyramids and Cones Shape and Space 20
9 Introduction to Multiplication Number 22
10 Multiplication of 2, 5 and 10 Number 24
11 Multiplication of 4 and 8 Number 26
12 Telling Time Measures 28
Test 2 (Exercises 1 – 12) 30
13 Time in a Day Measures 34
14 Interesting Multiplication Number 36
15 Multiplication of 3 and 6 Number 38
16 Multiplication of 7 and 9 Number 40
17 Multiplication of 0 and 1 Number 42
18 Year, Month and Day Measures 44
Examination (Exercises 1 – 18) 46
Analysis of Common Questions in Public Exam 52
Public Exam High Grade Shot 58
Brain Training 60
sample
Date:
Telling Time
12
Write the time.
1. 2. 3.
minutes minutes minutes
to past past
Show the given time on each clock.
4. Half past 12 5. 8 minutes past 3
Fill in the blanks.
6.
7.
The flight lasted h and min.
Start End
The performance lasts minutes.
Start End
Exam Tips
When showing the time on a digital clock, consider if you should add a ‘0’
to the ‘minute’ part.
sample
Intermediate Level
Advanced Level
8. The time now is 28 minutes to 8. Draw the minute hand and hour hand on the clock face.
9.
(a) The f ilm ends at minutes past in the afternoon.
(b) The f ilm lasts h and min.
10. The clock on the right shows the time when Mr. Wong arrived at the office today.
(a) He arrived at the off ice at minutes to
in the morning.
(b) He left home and went to work at
8 : 1 5
. He took minutes to get to the off ice.End Start
11. The charges for a car park is on the right.
Uncle Chan parked his car in the car park at 15 minutes past 3 and then had afternoon tea in a Chinese restaurant. He drove away at 25 minutes past 4. How much did he pay? (Write the letter next to the answer in the )
A. $8 B. $16
C. $24 D. $32
Exam Tips
Pay attention to the position of the hour hand. For example, to indicate the time ‘12 minutes to 10’, as the time is later than half past 9, the hour hand should be pointing closer to 10 than to 9.
Charge of the Car Park Every half an hour
(Half-hourly rate is charged for parking time
less than half an hour)
$8
sample
Date:
Multiplication of 3 and 6
15
Do the calculations.
1. 2.
3. 6 × 7 = 4. 3 × 3 =
5. 6 × 9 = 6. 3 × 8 =
7. 6 × = 3 × = 18
Solve the problems. Show your working.
8. My sister made 3 dumplings. The number of dumplings made by my mother was 9 times that of my sister. How many dumplings did my mother make?
9. A bottle of juice can just f ill up 6 glasses. How many glasses can 2 bottles of juice f ill up?
10. There are 6 pencils in one box. A teacher buys 5 boxes for a class of students. The pencils are just enough for each student to get one. How many students are there in the class?
11. A shoe cabinet has 7 layers. Each layer can store 6 shoes. How many pairs of shoes can the shoe cabinet store altogether?
6
× 4
3
× 5
Exam Tips Pay attention t o h o w m a n y pairs of shoes
‘6 shoes’ equal.
Note The product of 6 and any number is even.
sample
Intermediate Level
Advanced Level
12. The price of each can of coke is 6 dollars. My brother buys 6 cans of coke. He should pay dollars in total.
13.
The number of chocolates in a large box set is 10 times that of a small box set.
There are chocolates in a large box set.
14.
It takes 6 strawberries to make a strawberry cake. This pack of strawberries ✤ is / is not enough for making 3 strawberry cakes. (✤ Circle the answer) 15. There are 4 classes in primary 2. Each class has 3 students
joining the inter-class Q&A competition. How many primary 2 students join the competition altogether? (Show your working)
Small box set Large box set
16. Staff of Joyful Company filled up four tables at a Chinese restaurant. Staff at each table ordered 2 baskets of shrimp dumplings. Each basket contained 3 shrimp dumplings. How many shrimp dumplings did they order altogether?
Answer: They ordered shrimp dumplings altogether.
Class 2A
sample
Analysis of Common Questions in
Public Exam
Calculation
1. 4 8 + 2 6 6
2. 70 − 43 =
3. 5
× 6
4. 10 × = 10
Sequencing
5. The number of boxes of pineapple cake sold by a bakery in the past three months is shown below.
June July August
Number of boxes 486 468 648
Arrange the numbers of boxes from the smallest to the largest.
Answer: , ,
(smallest) (largest)
(Exercise 4 – Q1)
(Exercise 7 – Q5)
(Exercise 10 – Q2)
(Exercise 17 – Q8)
(Exercise 1 – Q14)
When performing addition in column form, align the digits carefully and pay attention to carrying.
Smart Tactics
If the digit in the units place is not large enough for subtraction, borrow 1 from the tens place as 10 in the units place.
Smart Tactics
Remember the properties of multiplication of different numbers.
Find the number that the product of 10 and that number is 10.
Smart Tactics
When comparing 3-digit numbers, you should first compare their digits in the hundreds place. If they are the same, then compare the digits in the tens place, and so on and so forth. Also note that the question asks for arranging the answers from the smallest to the largest.
Smart Tactics
In the result of multiplication of 5, the digit in the units place is either 5 or 0.
Make use of this property to check the answer.
Smart Tactics
sample
Public Exam High Grade Shot
1.
Yvonne uses the number cards above to form three different 3-digit odd numbers and arranges them from the largest to the smallest. The second number is 417. Fill in the blanks with suitable numbers.
Answer: , 417,
(largest) (smallest)
The number cards can form these 3-digit odd numbers: 147, 417, 471 and 741. As the question already sets 417 as the middle number and only 147 is smaller than 417, 147 should be written on the blank above ‘(smallest)’. Both the remaining numbers 471 and 741 are larger than 417, so either of them can be written on the blank above ‘(largest)’. There is more than one set of correct answers for the question. You do not have to feel confused by this.
Sorting It Out
2. Fill in the with the correct digits.
1 8
+ 2
1 7 1
For this type of question, start with the units place. To get the 1 in the units place of the sum, 3 is the only digit can be added to 8. So, you should write 3 in the box in the units place. As 8 + 3 = 11, 1 should be carried to the tens place. Then, think about the tens place. 4 + 2 + 1 = 7, so 4 should be written in the box in the tens place.
Sorting It Out
(Exercise 1 – Q16)
7 1 4
(Exercise 4 – Q15)
Mind the Trap
Students may overlook that the answers must be odd numbers or overlook that 417 is set as the middle number.
Mind the Trap
W h e n a n s w e r i n g t h i s t y p e o f question, students often fail to find the answers by thinking backward.
Students may also forget to think about carrying and borrowing.
sample
Brain Training Brain Training
1
3
Fill in the with suitable numbers to complete the patterns.
The following is the addition of two 3-digit numbers.
2
The minute hand of the clock below forms two right angles with the hour hand. Draw the minute hand on the clock face.
X = Y = Z = X 0 Z
+ 8 Y 1 Z X Y
