Answer:
Suggestion: Set up a clothesline (a string held up by a couple of magnets)
in the classroom. Write numbers on tent cards (paper that is folded so that
it loops over the string). Identify the end points (reference points). Have
students place given numbers on the line and then justify their placement.
Q Roll the Dice: Students roll a 0-to-9 die four times and record the numbers
shown as a 4-digit number on an erasable surface or on paper. Have students
use their numbers to arrange themselves from greatest to least (descending
order). This can be made more challenging by doing it without talking.
Note: It is important that students are aware that when comparing two
numbers with the same number of digits, the digit with the greatest
value should be focused on first. For example, when asked to explain why
one number is greater or less than another, they might say that 2541 is
less than 3652 because 2541 is less than 3 thousands while 3652 is more
than 3 thousands. When comparing 5367 and 5489, students will begin
comparing the thousands and move to the right.
Q Find the Error: Prepare sets of numbers that have been ordered from least
to greatest (ascending order) or greatest to least but with one or two errors.
Have students identify the error(s) and then write them in the correct order.
Example:
4000 4004 4040 4404 4044 4400
X X X
Correct order: 4000 4004 4040 4044 4400 4404
Have students make of sets for the class to solve.
Q What Number Fits? Give two reference points and have students write a
number that fits between them.
Example:
Write a number that lies between
5100 and 5200
3199 and 4019
8490 and 9500
Explanation:
correct if lm wrong
