The area of the school library is 85 square meters. How many square bricks does it take to lay a floor with a side length of 0.9 meters? [solving equation]

Solution: I don't know the length and width of the library, so I can only estimate it, and I have to use the equation to solve it: it is redundant to use the equation to solve it;

If x blocks are needed, there are:

0.9*0.9x=8 1

0.8 1ⅹ=8 1

ⅹ= 100

At least 100 square tiles are required.

Attachment: Arithmetic method:

8 1÷(0.9*09)

= 100 (block)

The title data is 85 square meters, and the development details are 8 1. I don't know why.

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