Cambridge Checkpoint Maths Workbook 7 Solutions – Unit 1: Addition, Subtraction, Multiplication & Division
Welcome to the complete solution guide for the Cambridge Checkpoint Lower Secondary Mathematics Workbook 7, published by Hodder Education. This resource is designed to support students, teachers, and parents with step-by-step answers to all units in the workbook.
This post covers Unit 1: Addition, Subtraction, Multiplication & Division, which includes two key exercises—Exercise 1.1 and Exercise 1.2–1.3. Each exercise contains well-structured questions to reinforce learners' understanding of fundamental arithmetic operations. The worked solutions here aim to build confidence, accuracy, and fluency in handling numbers—an essential skill for Checkpoint success.
⚠️ Disclaimer
This material, provided by Ugwoke Charles, is not officially affiliated with or endorsed by Hodder Education or Cambridge Assessment International Education. All workbook content remains the property of the original publisher. These solutions are offered strictly for educational and revision purposes. Readers are encouraged to support the publisher by purchasing the official workbook.
Solutions
Exercise 1.1
Question 1:
Calculate:
a. \(62 + 18 =.......... \)
b. \(24 + 36 =.......... \)
c. \(17 + 73 =.......... \)
d. \(68 - 23 =.......... \)
e. \(54 - 31 =.......... \)
f. \(73 - 25 =.......... \)
a. 80 \( \; \) b. 60 \( \; \) c. 90 \( \; \) d. 45 \( \; \) e. 23 \( \; \) f. 48
Question 2:
Ben is going on a bike ride. He start in Brighton and cycles 32 miles to Chichester. From Chichester, he then cycles 17 miles to Portsmouth.
a. What is the total distance Ben cycles?
b. Ben then cycles all the way home from Portsmouth back to Brighton cylcling the same route he went on the way there. What is his total distance?
From Brighton to Chichester = 32 miles
From Chichester to Portsmouth = 17 miles
\(32 + 17 \) miles \( = 49 \) miles
Answer: 49 miles
b.Total distance if he cycles back the same way to Brighton?
He returns from Portsmouth → Chichester → Brighton, so the return trip is also:
\(17 +32 \) miles \( = 49 \) miles
Total round-trip distance:
\(49 \) miles (going) \( + \) \( 49 \) miles (return) \( = 98 \) miles
Answer: 98 miles
Question 3:
Work out:
a. \(121 + 59 =.......... \)
b. \(263 + 27 =.......... \)
c. \(15 + 235 =.......... \)
d. \(42 - (-28) =........ \)
e. \(73 - (-137) =....... \)
f. \(-86 -(-46) =........ \)
Question 4:
A jug contains 720 ml of lemonade. When filled, each glass holds 200ml of lemonade.
a. How many glasses can be filled?
b. How much lemonade is left in the jug?
Capacity of one glass = 200 ml
a.To find how many full glasses can be filled, we divide the total lemonade by the capacity of one glass:
\( \frac{720}{200} = 3.6 \)
We can only fill 3 full glasses (since the 0.6 means the 4th glass would not be full).
Answer: 3 glasses
b.To find the leftover lemonade, we calculate how much was used for 3 glasses:
\( 3 \times 200 = 600 \)ml
Now subtract that from the total:
\( 720 - 600 = 120 \)ml
120 ml is left in the jug
Answer: 120ml
Question 5: A sunflower grows 12cm every fortnight. The sunflower has a current height of 53cm. Calculate how many weeks until the sunflower is over 100cm tall.
Current height = 53 cm
We want to find out how many weeks it will take for the sunflower to grow over 100 cm
A fortnight = 2 weeks
So the sunflower grows:
12 cm every 2 weeks ⇒ 6 cm per week
We want the height to be more than 100 cm. Currently, it's 53 cm, so we calculate how much more it needs to grow:
\( 100 − 53 = 47 \)cm needed
Since it grows 6 cm per week, divide:
\( 476 \) \( \approx 7.83 \) weeks
This means after 7 weeks, the sunflower will have grown:
\( 7 \times 6 = 42 \)cm, \( 53 + 42 = 95 \)cm (Not yet over 100)
After 8 weeks, it will have grown:
\( 8 \times 6 = 48\)cm, \( 53 + 48 = 101 \)cm (Over 100)
\( \therefore \) It will take 8 weeks for the sunflower to grow over 100 cm.
Answer: 8 weeks
Question 6: A bus can carry a total of 65 passengers. At the first stop 17 people get on the bus.
a. How many more passengers can the bus carry after the first stop?
b. Throughout the trip, the bus picks up a total of 52 passengers. How many passengers were picked up after the first stop?
a. At the first stop, 17 people get on the bus.
\(\;\;\;\;\;\;\;\;\;\;\; \) \( 65 − 17 = 48 \) people
Answer: The bus can carry 48 more passengers after the first stop.
b. We already know 17 passengers got on at the first stop, and the total picked up is 52.
\(\;\;\;\;\;\;\;\;\;\;\; \) \( 52 - 17 = 35 \) people
Answer: 35 passengers were picked up after the first stop.
Exercises 1.2 - 1.3
Question 1:
Work out:
a. \( 210 \times 8 = ............\)
b. \( 15 \times 40 = ............\)
c. \( 120 \times 60 = ........... \)
d. \( 35 \times 20 = ............\)
e. \( 3200 \times 5 = .......... \)
f. \( 85 \times 600 = .......... \)
a. \(1680 \) \(\; \) b. \( 600 \) \(\; \) c. \( 7200 \) \( \; \) d. \( 700 \) \(\; \) e. \( 16000 \) \(\; \) f. \( 51000 \)
Question 2:
Work out:
a. \( 136 \div 8 = .......... \)
b. \( 4200 \div 6 =.......... \)
c. \( 640 \div 80 =.......... \)
d. \( 120 \div 40 =.......... \)
e. \( 480 \div 4 =.......... \)
f. \( 7200 \div 60 =.......... \)
a. \(17 \) \(\; \) b. \( 700 \) \(\; \) c. \( 8 \) \( \; \) d. \( 3 \) \(\; \) e. \( 120 \) \(\; \) f. \( 120 \)
Question 3: William owns a bakery and each week he sells 24 loaves of bread. How many loaves of bread does he sell in 6 weeks?
In 6 Weeks he sells:
\( 24 \times 6 = 144\) loaves
Answer: 144 loaves
Question 4: In a field there are 40 sheep, 12 horses and 25 chickens. How many legs are in the field?
Each sheep has 4 legs.
There are 40 sheep, so:
\( 40 \times 4 = 160 \) legs
Horses
Each horse also has 4 legs.
There are 12 horses, so:
\( 12 \times 4 = 48 \) legs
Chickens
Each chicken has 2 legs.
There are 25 chickens, so:
\( 25 \times 2 = 50 \) legs
Total Legs in the Field:
\( 160 \) (sheep) \( + \) \( 48 \) (horses) \( + \) \( 50 \) (chickens) \( = 258 \) legs
Answer: 258 legs
Question 5: On an aeroplane there are 215 seats. In each row there are 2 seats on one side of the aisle and 3 seats on the other side. How many rows are there in total?
2 seats on one side of the aisle
3 seats on the other side
So, total seats per row =
\( 2 + 3 = 5 \) seats per row
To find the number of rows, divide the total number of seats by the number of seats in one row:
\( \frac{215}{5} = 43 \)
Answer: 43 rows
Question 6:
Calculate:
a. \( - 13 \times 5 = .......... \)
b. \( - 22 \times - 15 = ......... \)
c. \( - 540 \div 60 = ............ \)
d. \( - 125 \times 8 = ........... \)
e. \( 7200 \div - 9 = ............ \)
a. \(− 65 \) \(\; \) b. \( 330 \) \(\; \) c. \( −9 \) \( \; \) d. \( − 1000 \) \(\; \) e. \( − 800 \)
Question 7: Fill in the missing values from the multiplication table below.
Post a Comment