1. Lesson 1: Place Value

2. 12587654236841 Why is this number hard to read!?

3. 4 538 902 761  For the number above, find and write the digits for the following place values: ten thousands ones thousands ten millions billions hundred millions

4. Take these numbers and write them with the correct spacing…  3412  34125  864312  9004999  60548902  432157809  3412  34 125  864 312  9 004 999  60 548 902  432 157 809

5. Another student did this:  wrote 78939045672 as 789 390 456 72  Is this right? Why or why not?  What was this student thinking?  Why did he/she make this mistake? How to avoid this mistake: Start at the right, draw lines in between every third digit. ex. 78939045672  78|939|045|672  78,939,045,672

6. 45 3890 2761  What is the place value of the 5?  Was it harder to read the place value in the number this way?  How is this spacing different from how we usually write a number?  We usually group place values by 3’s, (ones, hundreds, thousands), so it’s weird to see it grouped in 4’s.

7. In Japan, however…  their place value names look like this: one tenhundredthousand manten man hundred man thousand man oku ten oku hundred okuthousand oku chouten chou hundred chou thousand chou  man means ten thousand (10 000)  what does oku mean?? How about chou???  oku means 100 000, and chou means 1 000 000.  This means their place values are grouped by 4’s!!

8. Comparing Values of Digits  What does it mean for a number to be so many times another number?  30 is 10 times 3, so 30 is ten times as big as 3.

9. How many times more is the first 3 worth than the second 3? a) 33 b) 330 c) 3300 d) 33 000 e) 334 507 f) 3 398 412 g) 303 h) 3003 i) 30 003 j) 300 003 k) 342 173 l) 2 356 783 542 a)10 b)10 c)10 d)10 e)10 f)10 g)100 h)1000 i)10 000 j)100 000 k)100 000 l)100 000

10. How many times more is the 6 worth than the 3? a) 63 b) 630 c) 6300 d) 63 000 e) 634 507 f) 6 398 412 g) 603 h) 6003 i) 60 003 j) 600 003 k) 642 173 l) 2 642 173 542 a) 20 b) 20 c) 20 d) 20 e) 20 f) 20 g) 200 h) 200 i) 20 000 j) 200 000 k) 200 000 l) 200 000

11. How many times more is the 3 worth than the 6? a) 36 b) 360 c) 3600 d) 36 000 e) 364 507 f) 3 698 412 g) 306 h) 3006 i) 30 006 j) 300 006 k) 342 176 l) 2 342 176 542 a) 5 b) 5 c) 5 d) 5 e) 5 f) 5 g) 50 h) 500 i) 5000 j) 50 000 k) 50 000 l) 50 000