The number synthesized by 1. () and () is called band score.

2. True score () 1, false score () 1.

3. The numerator and denominator are fractions of different prime numbers, () the simplest fraction.

4. Fill in the appropriate scores in brackets. 1 m17cm = () m 65min = () h.

The false fraction of molecule 8 is (), where () can be converted into a band fraction and () can be converted into an integer.

For the shaded part in the figure below, if it can be expressed by a fraction, put this fraction in brackets, if it can't be expressed by a fraction, put a cross.

Fill in the appropriate score in (). (1)17cm =()m (2)159m = () km (3) 3 decimeters = () m.

(4) 89g = () kg (5) 1250kg = () tons.

Second, the application problem

1. Put 5g of salt into 355g of water. What is the weight of salt in brine?

It is planned to dig a 90-meter-long drainage ditch in five days. How much is this ditch dug every day on average? How many meters do you dig every day on average?

3. Put10g salt into100g water. How much is salt? What is the percentage of salt in brine?

There are 44 male workers and 36 female workers in the grocery store. What is the ratio of male to female workers in the whole store? How many times the number of male workers is that of female workers?

3. 1. Divide the scores of the following groups and compare the sizes.

2. Divide the scores of the following groups and compare the sizes.

3. Divide the scores of the following groups and arrange them in descending order.

4. Divide the following scores in order from small to large.

Fourth,