Count 32 Links. Repeat the activity in Part 2 using
32 links. Use discussion prompts similar to those used
for 24 links to compare the chains. Conclude the lesson
with a more general discussion of grouping and
counting.
- How do you like to count the chains—by ones, twos,
fives, or tens? Why? (Possible responses: I like to
count by twos because I am good at counting by
twos. I like to count by tens because it is quicker.
When the links are by colors in fives, I don't make
as many mistakes.)
- Let's count the chain that is organized by tens.
- Count the chain that is organized by twos. How is
counting by tens the same as counting by twos?
(Possible responses: We get the same number when
we are done. We skipped some numbers both
times. When you count by twos you say the tens.)
- How is counting by tens different from counting by
twos? (Possible responses: Counting by tens is
faster. You skip more numbers when you count by
tens.
For 32, we didn't have to count leftovers
when we counted by twos.)
- Let's count to 32 by fives and leftovers on the number line.
- Let's count by tens and leftovers on the number line.
What do you notice? (When you count by fives,
you say more numbers. When you count by tens,
you just say the tens. When you count by fives, you
say the fives and tens.)
