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Problem-solving strategy (the sixth grade on the book)

Dream 0 sector2010-01-29 20:01:54 +0000 #1
the school bought three, and seven football, basketball, and spent 645 yuan. Are known to each of your football more than 15 yuan each basketball, soccer and basketball is the number of each unit?

Help help bar !!!!!!!!!
Dream Rose Snow2010-01-29 20:04:20 +0000 #2
(645 -15 × 3) ÷ (3 +7)

= 600 ÷ 10

= 60 (million)

60 +15 = 75 (million)

A: Unit 75 football, basketball unit 60.
rywjk2010-01-29 20:27:57 +0000 #3
Soccer 54 yuan, 39 yuan basketball.

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