Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood
11.1.11 classwork tuesday
1. Writing Journal: November 1st is National Author's Day. Pretend that you are a famous author
visiting an elementary school with a copy of your latest book. Write about how the children react
when they meet you and see your new book.
Brianna Johnny Mitzy Joshua Roxana Joey Emma Max
Nyashia Cincere
Ricardo Ramon Eric Natalie Alan
Christian Jose Gia Adolfo David Andres Massire Cameron
Elizabeth Carlos Linder Brian
Crystal Christopher Angel Matthew
Ryan Sualee Alan
2. "The secret of getting ahead is getting started."
Practice: Multiply
• Exercise 9 -27 on page 56.
3. Reading - Write an Advertisement
A writer's hard work is for nothing if no one
reads his or her words.
To get reader's interested in reading, writers
write strong openings.
Often, these openings cause readers to ask
questions that can be answered only by continuing
to read.
4. Reading - Prewrite (Idea Web)
Scout Troop 92 is having
a dog wash to raise money.
Marion Animal Shelter
Date, time, location of
needs money.
Facts dog wash
Come to Scout Troop Number 92's
dog wash to raise funds for the
Marion Animal Shelter.
Opinions
Persuasive
Techniques
Our community cares
for animals.
Morals: Did you know the folks Emotions: We'll lovingly wash, dry,
who run the Marion Animal Shelter and brush your pet for only five
are having trouble making ends meet? dollars.
5.
6. Math - Repeated Addition
Multiplication is a fast way of adding a series
of numbers.
3 x 5 means to add 3 together 5 times or
3+3+3+3+3
7. Math - Commutative Property of Multiplication
The commutative property of multiplication
simply means it does not matter which
number is first when you write the problem.
8. Math - Zeros
Multiplication is repeated addition so:
0x3=0+0+0= 0
Any number times zero is always zero!
9. Math - Ones
Multiplication is repeated addition so:
1x4=1+1+1+1= 4
Any number times one is always itself!
10. Math - Twos
Multiplication is repeated addition so:
2x4=4+4=8
Any number times two is the number doubled!
2 x 4 would be 4 + 4 or 8
2 x 6 would be 6 + 6 or 12
11. Math - Fives
If you are multiplying five times an even number, take half of
the number and put a zero after it
For example 5 x 6 (6 is even)
• take half of 6 (30)
• add a zero - 40
If you are multiplying five times an odd number, subtract 1
from the number and halve the number
For example 5 x 7 (7 is odd)
• Subtract one from 7 (6)
• take half of 6 (3)
• Add a five - 35
12. Math - Nines
This is the one less = nine method
Subtract one from the number you are multiplying by.
• 9 x 5 (one less than 5 is 4)
The two numbers that make up the answer will equal 9.
• The last number in the answer is 5
• 4+5=9
Here is another example
• 9x8
• One less than 8 is 7. So the first number in the answer is 7
• 7+2=9
• So the second number in the answer is 2.
13. Math - Multiply Whole Numbers by Decimals (page 70)
Find 9 x 0.7
Step 1: Multiply as with whole 0.7
numbers.
x 9
Step 2: Count the total number
of digits after the decimal point
in each factor.
0.7 digits
Step 3: Add the digits. Count in
x 9 digits
that many places from the right
in the product. Th
ink
:c
fr o
om unt
th in
e 1
rig digi
ht t
The answer is 6.3
14.
15. Math - Multiply Whole Numbers by Decimals (page 70)
You can use patterns to multiply
1 x 12.5 = 12.5
decimals by multiples of 10.
10 x 12.5 = 125
100 x 12.5 = 1,250
Think: the number of zeros in
1,000 x 12.5 = 12,500
the multiple of 10 tells you how
many places to move the decimal
point to the right.
So 12.5 x 1,000 equals 12,500.
