Shandong Heze Mathematics Grade 5 Volume 1 Shandong Heze Mathematics Grade 5 Volume 1 Exercise 12 All the questions are copied urgently! Urgent! Urgent! Urgent! Urgent! Urgent!

1. Vertical calculation. 0.68 x9 3.24 x65 32x 1954 x 0.4 1.05 x24 0.2 17x 182。 Xiaohua heard thunder three seconds after seeing the lightning in the distance. It is known that the propagation speed of lightning in the air is 0.33 meters per second. How far is lightning from Xiaohua? Omit the time when you saw the flash from the flash. 4.5.6.7, if you have something to call, you should ask Xinhua Bookstore. It should be sold.

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