Current location - Training Enrollment Network - Mathematics courses - What is the grade of snail climbing well?
What is the grade of snail climbing well?
Snail climbing well is a topic in the second grade of primary school mathematics.

Snails crawl at the bottom of the well at a depth of 10 meter, climbing 5 meters during the day and sliding down 4 meters at night. How many days does it take for snails to climb to the wellhead?

(1) analysis

(1) One day and one night: climbed 5-4= 1 meter.

(2)5 days later: I climbed 5 meters.

(3) Last day: Snails don't have to spend the night in the well, but can climb out during the day. On the last day, the little snail actually advanced 5 meters, which was different from the previous days!

(4) So the snail crawled out in six days.

(b) Problem solving skills

Two-stage thinking

(1) The situation these days.

(2) the situation on the last day.