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3. Write the numbers from the smallest to the biggest using a number strip.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

(a) 11, 10, 13, 14, 12

(b) 17, 14, 13, 16, 15

(c) 15, 18, 16, 19, 17

4. Write the numbers from the biggest to the smallest using a number strip.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

(a) 13, 15, 14, 12, 16

(b) 10, 9, 11, 8, 12

(c) 11, 14, 10, 12, 13

ordiNAL Numbers

Look at the picture of a zoo train.

Fox is at the first position.

Rabbit is at the second position. Sixth 9 10 Tenth

Monkey is at the third position. 6 7 8 Ninth

5 eighth

4 Seventh
3 fifth
2 Fourth
1
Third

Second

First

elephant is at the tenth position.

first, second, third, fourth, ..., tenth are ordinal numbers. We can also write them
as 1st, 2nd, 3rd, 4th, ..., 10th.

Numbers that tell us the position or place of something placed in an order are called

ordinal numbers.

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