Lesson 1, Unit 2

1. Think about collecting 1 million of something'
Srown-haired PeoPle have about
100 000 hairs on their heads'
5o,to callect 1 million hairs,
you would need the hair from
about 10 brown:haired PeoPle'
*&*q*5**$q****a!t*rst*s**$*a&B$tf **f 8*s****e*{t**6-.- ffi
Here are some questions about 1 million"
How rnqng d*tigtcrg' Pr:geq
wou{d ii feike fo:*sf i.millisn
How iong do goo'fhinklf
wonds and thelr ddinrfions?
wc'rid toke fo rncrke cr
c*{n*lator counl bg ones
fa 1 million? :
How lcng wcclcJ a line *f
1 nillion chilciren sionding
side bg sid* be?
Choose one of these questions to explore,
sr think of a question of Your own'
Gather any materials you will need'
Estimate an answer to your question'
Then develop and carry out a strategy to find
the answer'
Sg*tlg * lnv*iigofie snd describe o*re million'

2. $houn msw# $hare
Share your question, estimate, and answer with another pair of students.
Describe the strategy you used to find your answer.
ls your answer exact or is it approximate? Explain.
One million is 10CI0 thousands. lt is a very large number!
l-'iere are some benchmarks to help you think about 1 million.
I 000 CI00 is eqrclto
1 fi 00 thousctnd c'-.rh,es.
33

3. ,*
tli
th
t-
li
i.i
lin
;ltl
:+
is
r. al How many small squares are there on this grid?
al How many smallsquares would be on 10 grids?
On 100 grids?
What strategy did you use to find your answers?
el Suppose you need 1 million small squares.
Estimate the number of these grids you need'
Find the number of grids needed to make 1 million'
2- Flow long would a llne of 1 million centimetre cubes be?
Give your answer in as many different standard units
of measure as you can. Show your work.
3. al Suppose you use a calculator to eount by 100 000s to 1 CI00 000"
How many times willyou press S? Use a calculator to check.
hl How many times would you have to press [:l
to count by 1CI 000s to 1 000 000? use a calculatsr to rheck
4. How many days will it take you to spend $1 000 000,
if each day yoLl sPend each amount?
al $100000 bl $10000 cl $1000
dl 5100 e| $10
Show your work'
I. Estimate the length of t million straws arranged end to end.
Find the answer. Show Your work.
Was your estimate high or low? Explain.
6. Write your own problem about 1 million'
Trade problems with a classmate.
5olve your classmate's Problem.
,. Suppose your heart beats 70 times a minute.
How lonE would it take to beat 1 million times?
Sdle*t*l fiS*th ', ..,
Write an equival*Rt,, -
i dg*irsalifsi e**h, fftnrrbrr
* S;$,'
Explain how yott could'figure out about ": 2.gg',
how many day; there are in I rnillion seeonds' ' 31.7S
' S94.3
focug * Question 2 Urrii 2 Less${t