This document provides information about numbers from 1 to 20, and 20 to 100 in English and Spanish. It lists the numbers and their names. For numbers between 13 and 19, the names end in "teen". For numbers between 20 and 90, the names end in "ty" except for 30 which is "thirty". It also provides tips on forming the names of numbers in these ranges by combining individual digits.

1. Numbers 1 to 20
1 – One 6 – Six 11 – Eleven 16 -
Sixteen
2 – Two 7 – Seven 12 – Twelve 17 -
Seventeen
3 – Three 8 – Eight 13 – Thirteen 18 -
Eighteen
4 – Four 9 – Nine 14 – Fourteen 19 -
Nineteen
Tips: • Después del número 12, todos terminan en –teen;
5 – Five•Números: 14 – Ten 10
10 4+ = Four15 – Fifteen
+ teen 20 -
Fourteen
Twenty
16 6 + 10 = Six + teen Sixteen
17 7 + 10 = Seven + teen Seventeen
18 8 + 10 = Eight + teen Eighteen
19 9 + 10 = Nine + teen Nineteen
• Los números 13 e 15 también terminan en – teen, pero cambian
un poco más: “Three” cambia a “Thir” y “Five” a “Fif”.
13 3 + 10 = Three + teen Thirteen (NO Threeteen)
15 5 + 10 = Five + teen Fifteen ( NO Fiveteen)
Numbers 20 to 100
20 – Twenty 40 – Forty
Tips: • Los números 20, 30, 40, 50,
60, 70, 80 e 90 terminan en –ty;
21 – Twenty-one 50 – Fifty
20 Twenty
22 – Twenty-two 60 – Sixty
30 Three + ty = Thirty
23 – Twenty-three 70 – Seventy 40 Four + ty = Forty
50 Five + ty = Fifty
24 – Twenty-four 80 – Eighty 60 Six + ty = Sixty
70 Seven + ty = Seventy
25 – Twenty-five 90 – Ninety
80 Eight + ty = Eighty (só um “t”)
90 Nine + ty = Ninety
30 – Thirty 100 – One hundred