Ancient Egyptian numbers

Ancient Egyptian numbers

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

Challenge:

What number is this? Why?

Some Ancient Egyptian numbers

	1
	10
	100

Challenge:

What are these numbers?

	144  ----->uuuu------>llll
	602 ->ll
	379-->uuuuuuu--->lllllllll
	315 --->u-->lllll
	636 -->uuu--->llllll
	377 --->uuuuuuu---->lllllll

What is the same about the last two numbers they have

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 --->lllllll
42	UUUUll-------->uuuull
220	UU--->--->uu
608	llllllll----->-->llllllll
795	UUUUUUUUUlllll ---->uuuuuuuuu------->lllll

Addition

Challenge:

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

7 + 5	Ull u--->ll
36 + 15	uuuuul  uuuuu------>l
274 + 418	uuuuuuuuul ------->uuuuuuuuu------->l
593 + 109	l ------>------> l

Subtraction

Challenge:

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

12 - 3	lllllllll------->lllllllll
23 - 17	llllll------>llllll
445 - 152	UUUUUUUUUlll------->--->uuuuuuuuu--->lll
623 - 249	UUllllll ------->--------> uu------>lllllllll

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

                                                                                hard