Pri 4, Concept Worksheet Set 2

Pri 4, Concept Worksheet Set 2

EQUAL at FIRST

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John and Peter had an equal number of pencils. After John had bought 15 pencils and Peter lost 6 pencils, John had 8 times as many pencils as Peter. How many pencils did each boy have at first?

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There was an equal number of bowls and plates in the cupboard at first. After Jane broke 5 plates and her mother bought 15 more bowls, there were 5 times as many bowls as plates. How many bowls were there at first?

Poll

Let's think about Q4 that we have already done.

4. Mrs Toh had an equal number of chocolate and cranberry muffins. After selling 10 chocolate muffins and baking another 18 cranberry muffins, she had twice as many cranberry muffins as chocolate muffins. How many cranberry muffins did she have in the end?

Get ready your answers!!!

• I am ready!

• I still don't know how to do...

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How many cranberry muffins did she have in the end?

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Mr Lee had an equal number of keychains and magnets. After selling 25 keychains and making another 19 magnets, he had 5 times as many magnets as keychains. How many magnets did he have in the end?

Now, let's look at:

EQUAL in the END

Compare Example A and B from your worksheet

• Page 1, Example A) Daniel and Patrick had an equal number of stickers at first. Daniel then gave away 20 of his stickers to his friend while Patrick bought another 12 stickers. In the end, Patrick had thrice as many stickers as Daniel. Find the number of stickers Daniel had at first. 

  
  

• Page 5, Example B) Daniel and Patrick had 156 stickers altogether. After Daniel had bought another 60 stickers and Patrick had given away 18 stickers, they had an equal number of stickers left. How many stickers did each of them have at first?

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Similarity : In both examples, Daniel and Patrick had an

number of stickers at a certain stage

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In Example A, Daniel and Patrick had the same number of stickers at the

.

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In Example B, Daniel and Patrick had the same number of stickers in the

.

Poll

Take 3 minutes to complete the guided practice.

Guided practice:

At a party, there were 68 boys and girls at first. Halfway through the party, 8 boys joined and 4 girls left the party. In the end, there was an equal number of boys and girls at the party.

(a) How many boys were at the party at first?

(b) How many girls were at the party at first?

Only click one of the options below AFTER you are done trying out the guided practice.

• Yes, I'm done

• I do not know how to do

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2 units --> ???

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1 unit --> ???

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Number of boys at the party at first --> ???

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Number of girls at the party at first --> ???

Poll

Let's try it!!! (3 min)

1. Cindy and Denise had a total of 224 pencils. After Cindy had bought another 36 pencils and Denise had given away 4 pencils, they had an equal number of pencils left. How many pencils did each of them have at first? Get ready your answers!!!

• I am ready!

• I still don't know how to do

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How many pencils did Cindy have at first?

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How many pencils did Denise have at first?

Poll

Let's try it!!! (3 min)

2. Mrs Tan had a total of 185 apples and oranges. She bought another 11 apples and gave away 26 oranges. In the end, she had an equal number of apples and oranges left.(a) How many apples did she have at first?(b) How many oranges did she have at first? Get ready your answers!!!

• I am ready!

• I still don't know how to do...

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(a) How many apples did she have at first?

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(a) How many oranges did she have at first?

Complete Q3 and Q4!!!

• Now, try it at home!