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Primary 4 | Maths
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Leai
Leai

Primary 4 chevron_right Maths chevron_right Singapore

Pls help!!!!

Date Posted: 1 week ago
Views: 13
Muhammad Nishath
Muhammad Nishath
1 week ago
Sardine buns he buy is 1.10×10=11.00 so it is 10
Leai
Leai
1 week ago
Tnks!!!
Eric Nicholas K
Eric Nicholas K
1 week ago
The total amount paid is $10.40, not $11.00, so he could not have possibly bought 10 sardine buns.

90c for curry bun; 110c for sardine bun

Total is 1040c, not 1100c.

Pretend he buys 10 sardine buns. Then he pays 1100c.

For every 1 sardine buns swapped with 1 curry bun, he pays 20c less because he pays 90c instead of 110c.

1 curry, 9 sardine is 1080c
2 curry, 8 sardine is 1060c
3 curry, 7 sardine is 1040c

so he bought 3 curry buns and 7 sardine buns.
Leai
Leai
1 week ago
Tnks!!!!!!!!

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Sarah Tan Si Kai
Sarah Tan Si Kai's answer
3 answers (Tutor Details)
1st
more of guess and check method
Leai
Leai
1 week ago
Tnks!!!!
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Kenneth Ng
Kenneth Ng's answer
10 answers (Tutor Details)
Leai
Leai
1 week ago
Tnks!!!!