1, write all the factors of the following numbers.

Factor of 1: 1

Factor of 6: 1, 2, 3, 6

Factor of 9: 1, 3, 9.

The factor of 10: 1, 2,5, 10.

Factors of 18: 1, 2, 3, 6, 9, 18.

Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24.

Step 2 tidy up

Multiples of 5: 5, 10, 15, 20, 25.

/kloc-multiples of 0/3: 13, 26, 39, 52, 65.

3. In the following groups, is the first number a factor or a multiple of the second number?

(1) multiple

(2) Factors

(3) Multiplicity

(4) multiples

(5) factors

(6) Multiple

Step 4 fill in the blanks

( 1) 17; 17

(2)27

(3) 1、5、7、35

5. Multiple choice problem

( 1)A

(2)C

(3)B

6. Judges

( 1)?

(2)?

(3)?

(4)?

(5)?

(6)?

Extended space

1, think about it, what natural numbers can be filled in the box force?

( 1)2、 10、 18、26、34、42

(2)5、20、35、50、65

2. Fill in the appropriate numbers in the corresponding positions.

Factor of 36: 9, 1 8,35,12,3,6,12,4.

Factors of 48: 1, 2, 3, 6, 12, 8, 16, 24, 48.

Common factors of 36 and 48: 1, 2, 3, 6, 12, 4.

Mathematics wisdom garden

1、6

2, 12 or 36