Ancient Egyptian

Ancient Egyptian numbers

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

Challenge:

What number is this? Why?

The answer is twenty three because… the lines represent ones in the egyptian language and the upside down U’s represents tens.  23

Some Ancient Egyptian numbers

	1
	10
	100

Challenge:

What are these numbers?

	l44
	602
	379
	314
	636
	379
	379

What is the same about the last two numbers?

What is different about the last two numbers?

Challenge:

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

7	IIIIIII
42	II
220	II
608	IIIIIIII
795	IIIII

Addition

Challenge:

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

7 + 5	IIIIIII IIIII → II←
36 + 15	IIIIII IIIII→I←
274 + 418	IIII IIIIIIII →II←
593 + 109	III IIIIIIIII →II←

Subtraction

Challenge:

Now try subtracting numbers. You cannot draw modern maths symbols like - and =.

12 - 3	II  III
23 - 17	III  IIIIIII
445 - 152	IIIII II
623 - 249	III IIIIIIIII

What can you understand about Ancient Egyptian numbers compared to modern numbers?

I learnt how the ancient egyptians write their numbers and how they solve equations.
I learnt it by looking at the hints and examples.