Numbers to 20：練習問題

What is the number word for the numeral \(11\)?

Look at the pattern below:
\(2, 4, 6, 8, \dots, 12\)
What is the missing number in the pattern?

If we use two 1-digit numbers to compose a number, and both 1-digit numbers are odd and different, what is the largest possible even number we can compose?

Look at the arrangement of circles below:
\( \bigcirc \bigcirc \bigcirc \bigcirc \bigcirc \)
\( \bigcirc \bigcirc \bigcirc \bigcirc \bigcirc \)
\( \bigcirc \bigcirc \bigcirc \)
How many circles are there in total?

Which number can be decomposed into the largest single-digit even number and the smallest single-digit odd number (excluding zero)?

When counting backwards from eighteen, what is the number that comes immediately after 17?

If you have a group of 14 candies, can you divide them into two equal groups? Is 14 an even or odd number?

Arrange these numbers from smallest to largest: \( 15, 11, 20, 18 \).

Look at the list of numbers below:
12, 5, 8, 17, 4
a. Count the numbers and write down how many numbers are in the list.
b. Arrange these numbers in order from smallest to largest.
c. Identify the odd numbers from the list.<\/p>

There are 20 students standing in a straight line for a photo.
a. If Ben is the 8th student from the left, what is his position from the right?
b. If Sarah stands between the 12th and 14th student from the left, what is her ordinal position from the left?
c. The teacher decides to group the 20 students into pairs. How many pairs are there? Is the total number of students odd or even? <\/p>