Official Pack · American English
Build English Numbers up to 100
Learn the irregular forms eleven and twelve, the -teen pattern, the tens, hyphenated compounds such as twenty-one, and one hundred. The examples give you enough structure to form the other numbers through 100.
A few things you will learn
11
elevenEleven comes after ten.12
twelveTwelve is an even number.13
thirteenThirteen is one more than twelve.15
fifteenFifteen is five more than ten.18
eighteenEighteen is nine plus nine.
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