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People have lived together in Ancient Mesopotamia for ____ years.
Hint: That’s 60 times as old as the world’s oldest animal, Jonathan the giant tortoise
Fill in the blank
About 6,000 years ago, farmers in Mesopotamia started to live together in big groups. These were the first ever.
Hint: It is a 6 letter word starting with c, meaning “large towns.” Go here http://www.kadingirra.com/ to see what these actually looked like.

The first cities in Mesopotamia were centers of innovation. The people learned how to build huge buildings, have a government, and study the sky. To help them with all this, they came up with:
Fill in the blank
The Babylonian number system was Base . This means that there are starting symbols that are then combined to make any number. For example, our number system is Base 10, and we make all of our numbers with the ten starting symbols 0,1,2,3,4,5,6,7,8,9.
Ask your parents why there are 60 seconds in a minute or 360 degrees in a circle. They probably won’t know that this comes from the:
Fill in the blank
Eventually, Mesopotamia would fade like its kings into the mists of history. And its cities would sink beneath the sands of Iraq. But its would survive in literacy, law, math, astronomy and the gift of civilization itself.
Hint: 5 letter word starting with “i,” meaning, smart thoughts, or the smart things that the Babylonians came up with.
What is a number system?
Fill in the blank
As human cities grew, along with the number of things to count, tally marks were no longer enough. As a result, different civilizations number systems.
Hint: an 8 letter word starting with “in,” meaning, came up with, or created.
What is true about our number system?
What is true about our number system?
Early number systems all had their own symbols for 0.
You could use a base 3, base 8, base 29 or base 1000 number system, if you wanted to.
Fill in the blank
I type 356. Then I delete the 3, I am left with 56. Deleting the 3 is the same as subtracting .
Hint: It’s not “3.” Consider the place value it is in.
Fill in the blank
I type in 250. Then I delete the 5. This leaves me with 20. Deleting the 5 was the same as subtracting .
Hint: It’s not “5.” Consider the place value it is in
Fill in the blank
10^0 =
10^1 = 10
10^2 = 100
10^3 = 1000
Hint. You have heard of the _s place, 10s place, 100s place, and 1000s place
A base three number system has a 1s place, a 3s place, a 9s place, and a 27s place. What comes next?
Hint: Multiply by 3
Fill in blank
A base four number system has a 1s place, a 4s place, and a 16s place. Next is the s place
Hint:
4 = 4
4 x 4 = 16
4 x 4 x 4 = ?
(Challenge) Fill in the blank
Write twenty one in base 4. In base 4, there are only 4 symbols: 0=zero, 1=one, 2=two, and 3=three.
Hint: Use place values. Some examples: in base 4…
“10” is 4
“11” is 5
“101” is 16+1 = 17
In each of these numbers, there is a 2. Match the number with the number that its 2 stands for, based on its position.
(Drag with your mouse or keypad)
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1502
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2,500,615
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52,005
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6,907,321
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