Lalang Group

Fred spent $4357 on a tour. Tim spent $230 more than Fred.
How much did Tim spend on the tour?

Amy's solution: 4357 - 230 = 4127
Tim spent $4127.

There is something wrong with Amy's solution.

1. Explain the mistake in Amy's solution.
2. Show how you would find the answer to the problem.

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Orchid Group

The mass of a lion is 180kg.
A cow is 36kg lighter than the lion.
Find the total mass of the two animals.

Ben's solution: 180 + 36 = 216
The two animals have a mass of 216kg.

There is something wrong with Ben's solution.

1. Explain the mistake in Ben's solution.
2. Show how you would find the answer to the problem.

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Hibiscus Group

Mary has 60 ice-cream sticks. Ted has 150 more ice-cream sticks than Mary.
Samy has 50 fewer ice-cream sticks than Ted.
How many ice-cream sticks do they have altogether?

Tony's solution: 60 + 150 = 210
210 - 50 = 160
210 + 160 = 370
They have 370 ice-cream sticks altogether.

There is something wrong with Tony's solution.

1. Explain the mistake in Tony's solution.
2. Show how you would find the answer to the problem.

Our class went to the Science centre today. We've learnt more about insects. Not only did we get to see specimens of different insects, we also saw live insects in small tanks.
I hope that this trip has been an eye-opening experience.

Hi class,
Please answer the following questions according to the group you were assigned.

Lalang group

Billy wrote this in his book.

5 x 6 = 30
So, 7 x 6 = 30 + 6 = 36

Explain the mistake in Billy's solution and obtain the correct answer.
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Orchid group

Billy wrote this in his book.

10 x 6 = 60
So, 9 x 6 = 60 + 6 = 66

Explain the mistake in Billy's solution and obtain the correct answer.
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Hibiscus group

Without using vertical multiplication,
how would you solve 22 x 6 if you are given 10 x 6 = 60?