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## Question

Primary 4 | Maths

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pls help

= 939

before.

LW: u

A: u+403

after,

LW: u-268

A: u+403+268 = u+671

difference = u+671 - (u-268)

= 939

Sachin : The who has more stamps received even more stamps, but the one who has less stamps now has even fewer stamps. now lost some stamps. So the difference increases by twice the number of stamps given.

For example,

You have $10, I have $5. Difference is $5

I decide to give you $3.

Now you have $13 while I have only $2 left. My amount decreases by $3, yours increases by $3. So the difference increases by $3 + $3 = $6

$5 + $3 + $3 = $11

Check : Difference now = $13 - $2 = $11

For example,

You have $10, I have $5. Difference is $5

You decide to give me $2

Now you have $8 left while I have $7. My amount increases by $2, yours decreases by $2. So the difference dcreases by $2 + $2 = $4

$5 - $2 - $2 = $1

Check : Difference now = $8 - $7 = $1

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