Page 28 - Genius PBD - Mathematics Year 4

PAK-21 ACTIVITY

UNIT 1 Numbers and Operations

Travelling file
1. The diagram below shows the questions found in 3 files.

Salman has 213 pieces of Dalila has 3 245 beads A box contains 2 987 red
foreign country stamps of various colours. She marbles and some blue
and 317 Malaysian uses 345 red beads and marbles. The number
stamps. Calculate the 325 white beads to sew of blue marbles in the
total number of stamps on a dress. Calculate the box is 95 less than red
owned by Salman. number of remaining marbles. Calculate the
beads. total number of marbles
in the box.

File 1 File 2 File 3

• Form 3 groups.
• Each group is provided with a file and are asked to discuss the solution for the
question in the file and write it on a piece of paper within 10 to 15 minutes.
• Then, put the question and the answer into the file and pass them to another PAK-21 ACTIVITY
group.

• Each group receives a new file from other groups and required to discuss the
question and the answer in the file and make correction if any.

• After each group has commented on each file, discuss all questions comprehensively.

Worked example:
File 1 File 2 File 3
213 + 317 3 245 – 345 – 325 (2 987 – 95) + 2 987
= 530 = 2 575 = 5 879
1 2 12 8 18
2 1 3 3 2 4 5 2 9 8 7
+ 3 1 7 – 3 4 5 – 9 5
5 3 0 8 9 1 1
10 10 2 8 9 2
2 9 0 0 + 2 9 8 7
– 3 2 5 5 8 7 9
2 5 7 5

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01 Genius PBD Maths Yr4.indd 21 27/10/2022 11:33 AM