当代医学12月第15卷第36期总第课件

1、当代医学12月第15卷第36期总第当代医学12月第15卷第36期总第 在全长在全长2020米的小路一边植树，米的小路一边植树，请按照每隔请按照每隔5 5米栽一棵的要求设米栽一棵的要求设计一份植树方案，并说明理由。计一份植树方案，并说明理由。（可用线段图表示）（可用线段图表示）当代医学12月第15卷第36期总第特点特点棵数棵数间隔间隔数数棵数与间隔数的棵数与间隔数的关系关系方案方案1方案方案2方案方案3方案方案4两端要栽两端要栽54棵数棵数=间隔数间隔数+1棵数棵数=间隔数间隔数1棵数棵数=间隔数间隔数棵数棵数=间隔数间隔数344444两端不栽两端不栽一端要栽一端要栽封闭封闭当代医学12月第15

2、卷第36期总第练习：练习： 在一条在一条100100米长的小路一边植米长的小路一边植树，每隔树，每隔4 4米栽一棵（两端要栽）。米栽一棵（两端要栽）。一共需要多少棵树苗？一共需要多少棵树苗？1005 20（个）（个）间隔数间隔数201 21（棵）（棵）棵数棵数答：一共需要答：一共需要21棵树苗。棵树苗。当代医学12月第15卷第36期总第Bzv-s&o!kXhTdQ9M6J2F:Bzv-r&o#kXhTdQ9M6I2F;Byv-r&o#kXgTdP9M5I2E;Byv)r&n#kWgTcP9M5I2E;Bx=t(q$mZiVfSbO8K4H0D.zw-s*o!lY

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