[Chris] Ancient Egyptian numbers 1

Ancient Egyptian numbers

Learning Intention:  to understand place value by using Ancient Egyptian numbers.

Challenge:

What number is this? Why?

23

Some Ancient Egyptian numbers

	1
	10
	100

Challenge:

What are these numbers?

	144
	602
	379
	314
	636
	379
	379

What is the same about the last two numbers?  They both have the same position

What is different about the last two numbers?The second to last one is mixed up, and the last one is ordered.

Challenge:

Change these numbers into Ancient Egyptian numbers. Insert a photo of your number written on a whiteboard.

7	IIIIIII
42	IIUUUU
220	UU
608	IIIIIIII
795	UUUUUUUUUIIII

Addition

Challenge:

Now try adding numbers. You cannot draw modern maths symbols like + and =.

7 + 5	UI
36 + 15	UUUUUI
274 + 418	I
593 + 109	II

Subtraction