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The answer to the new mathematics classroom of the fifth grade Qingdao Edition Volume II.
The first big problem

The first question 3

Second question 23.4

The third question is 1500dm2.

The fourth question 108 36

The second big problem

4 divided by 2=2m

2x2x 3. 14x 1.2x 1/3x 735

= 12.56 x 12x 1/3x 735

Approximately equal to 3692

The third big problem

15.7x3 divided by 3. 14= 15dm.

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