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Jiangsu education publishing house, fourth grade, second volume, mathematics supplementary exercise, page 87, answer.
1(300) square decimeter (30000) square centimeter (3.5) square kilometer (60) hectare (100) square meter.

2 (1)1.2 *1.4 =1.68 square decimeter (2)1.3 * 2.5/2 =1.625 square meter (3)

3( 1) 12 (2)240 (3) 18 (4)6 (5) 16

4.280 *160/10000 * 5 = 22.4 tons < 25 tons A: No.

This is my answer. I wonder if these are for your reference. It was sent late. Sorry, I just saw it now. Please forgive me! ~ ~ \(o)/ own brochure-_-. Excuse me!

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