Unit 27: Numbers

Which is a number?

• seven

• first

• follow

• second

Which is an ordinal number?

• Six

• Hundred

• Ninety

• Third

Which is not an ordinal number?

• Sixty-fourth

• Twenty

• Thirty-first

• Seventy-second

Which is an ordinal number?

• Sixteen

• Twentieth

• Thirty-one

• Seventy

We use ordinal numbers to show the ___ of things.

• number

• length

• order

• amount

Let's count to ten.

One, two, three, four, five, six, ___, ___, nine, ten.

• seven, eight

• eleven, ten

• eight, four

• eighteen, nineteen

Let's count by tens.

10, 20, 30, 40, 50, 60, ___, ___, 90, 100.

• seven, eight

• twenty, thirty

• seventy, eighty

• seventeen, eighteen

Let's skip-count.

Fifteen, twenty-five, thirty-five, ___.

• fourteen

• fifty-five

• fifty

• forty-five

Let's count backward.

Fifteen, fourteen, thirteen, ___.

• twelve

• fifty

• eleven

• seven

What is 6 plus 5?

• five-sixths

• one

• eleven

• thirty