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\\November 22, 2023 4:46 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Mental Maths

Fill in the blanks.
1. 17 cm + 20 mm = _________ mm 4. 7400 g – 600 g = _________ kg
2. 12 km – 600 m = _________ km 5. 12 L – 70 mL = _________ mL

3. 10 kg + 5 g = _________ g 6. 4L – 700 mL = _________ L

Brain Sizzlers

Riya takes 30 paces to walk 18.750 m. How many kilometres has she walked
after taking 10,000 paces?

Learning by Doing

Objective: To reinforce the concept of addition and subtraction of measurements
of height and weight.
Materials required: Weighing machine, measuring tape, pencil and notebook.

Procedure: 150
Š Divide the students into groups of 6. 140
130
Š Choose any group and instruct to measure the height and 120
110
the weight of each other and record in the table given 100
below. 90 80
Š Now, instruct the group to add the measurements and find 70 60
the total weight in kg and total height in cm of the group. 50

Member of group Height (in cm) Weight (in kg)
Member 1
Member 2
Member 3
Member 4
Member 5
Member 6
Sum
Š Also, find the difference in the height between the shortest and the tallest member in
the group.

Š Convert the height and weight of each member of groups into metres and grams
respectively.

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