It's sunny today. I read a thinking question in a book: a snail is trapped in a well with a depth of 15 meters. Snails climb 1 m every day and drop 30 cm at midnight. When can the snail climb out of the well? I listed the formula on the draft paper: snails climb 100-30 = 70cm every day, and snails climb 70cm every 10 day.

× 10=700 cm, the snail climbed 70×20= 1400 cm in 20 days, and on the second1day, the snail left1500-1400 =100. It takes 20+ 1=2 1 day for a snail to climb out of the well. It turns out that there is mathematics everywhere in life!

Follow-up: Teacher, what math is this in the second volume of the fifth grade?

Follow-up: Teacher, write a composition about the meaning of fractions.

Follow-up: not a composition, but a diary.

Follow-up: Teacher, can you change the last sentence?

Follow-up: It turns out that there is mathematics everywhere in life, which seems not quite right.

A: OK.