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Mathematics problems in primary schools. Please be sure to write out the calculation process.
Solution: It took him 1 1 minute to walk from the first tree to the tenth tree.

Stand by the first tree.

So it is 10- 1=9, and nine trees have disappeared.

Time to walk a tree = 1 1/9 minutes.

Then:

22/( 1 1/9)= 18

So after he walked for 22 minutes, he should have reached the tree 18.