Page 2 - ตัวอย่าง Math Solution 1

1 Integers

Look at the number line. The positive integers are 1, 2, 3, 4, …. the negative integers are -1, -2, -3, -4, ….

zero is not positive or negative.

4 3 2 1 0 1 2 3 4

Integers can be positive, negative or zero, as shown below:

Integers

Negative integers Zero Positive integers

Look at the numbers in the table below and find the positive and negative integers.

Number Positive Integers Negative Integers

-4
1. -4, -3, 0, 2, , 5 2, 5 -4, -3, -4
2
2
-1
2. 8, -2, , 3, 1.7, -0.2
10
6
1
3. -3, -1, 0, , 4,
8
2
90
4. -20, -7, 13, , -1, 2
9
30
5. -9, 70, 61, 20, , 8.6 70, 61, 20, 30 -9
2 2

1 40 6
6. -17, , , , -2, 3
20 4 3
1
,
7. 51, 0, , 100, -18 30
3
6
9
8. 6, -5, 11, -8, 4, -12

9. -3, 7, 31, -1, 5, 2, 0

4
10. -6, 9, -10, 29, -17,
9

6 Math Solution 1 Book 1