The attendance rate was 98.6%.

2. A number consists of 700 million, 90 million, 5 million, 700 and two ten groups.

Cheng, this number is (795000720), the number rewritten as "ten thousand" is (79500.072), and the mantissa after omitting "hundred million" is (7.9500072).

3. It needs to be cut (4 times) to divide the 3-meter-long iron wire into 5 sections, each with a total length of (1/5), each with a length of (0.75) meters and each with a length of 1 meter (75%).

4. Transfer Party A's number 15 to Party B. At this time, the numbers of both parties are equal. It turns out that Party A has more people than Party B (15).

5. 23 of number A is equal to 45 of number B, number A is (48.8 )% more than number B, and the ratio of number B to number A is ().

6. For circles, rectangles and squares with equal perimeters, the area of (circle) is the largest; For cylinders and cones with equal volume and bottom area, the ratio of the height of the cylinder to the height of the cone is ().

7, 8 tons 50 kg =( 8.05) tons 4.5 hours =( 4) hours (30) minutes.

8,12: 20 = (3): (5) = (): 2 = (44)% = (0.4) decimal

9. The line segment scale is rewritten as digital scale. On this map, the distance from Beijing to Shanghai is 4.2 cm, while the actual distance from Beijing to Shanghai is () kilometers.

10, 6 tons is () tons after increasing 16, and 6 tons is () tons after increasing 16.