Basic Mathematics


Essential for producing and storing food, business transactions, etc.

practice by counting items and using addition, e.g. 4 + 3 = 7




2.

Our number system has 10 symbols for representing numbers



		0

&		1

&&		2

&&&		3

&&&&		4

&&&&&		5

&&&&&&		6

&&&&&&&		7

&&&&&&&&	8

&&&&&&&&&	9





Larger numbers are represented using several digits



&&&&&&&&&&	10




3.


The second-last column represents 10 items, 

The third-last column represents 100 items, 

The fourth-last column represents 1000 items etc.



e.g.

	2,143		2 groups of 1000 items, 1 group of 100 items, 4 groups of 10 items and 3 extra items.



	&&&&&&&&&& &&&&&&&&&& &&&&&&&&&& &&&&		34 items



	&&&&&&&&&& &&&					13 items

		

	&&&...............				324 items




4.

addition


several groups can be added together into a single total


2 + 5 = 7


	&&		2

	&&&&&		5


	&&&&&&&		7




5.

subtraction

some items can be removed from a total


9 - 3 = 6


	&&&&&&&&&	9

	&&&		3


	&&&&&&		6 remaining 



6.

multiplication

several groups added together


2 x 4 = 8


	&&&&		4 


	&&&&		2 groups of 4
	&&&&


	&&&&&&&&	8 total



7.

division

how many times a small group can fit into a larger amount



8 / 2 = 4


	&&&&&&&&	8

	&&		2


	& & & &		4 number of times that 2 can fit into 8




9 / 2 = 4 + 1 remaining




8.

fractions


decimal amounts represent part of a total


	0.8		8 tenths of an item


	0.819		819 / 1000 an item




		






