lesson of yr 3 quiz understandation

operations : division and multiplication.

​how do you use the listed operations?

division : format : v / c = r. this means you get a value and divide it into different groups. the result amount of groups you get.
multiplication : you get a value and repeat itself a certain number of times. the repeated number is the answer.

multiplying by 2 is also called doubling

​doubling

dividing by 2 is also called halfing

​halfing

halfing and doubling

​carrying

when you add 2 3-digit numbers and in 1 or 2 places the answer is more than 9 in that particular place then we have to carry. the extra digit not in the particular place you take it to the next bigger place. note : when we add the hundreds (in a 3-digit number) and the result is more than 9 you do not borrow.

borrowing

when you subtract 2 3-digit numbers you get an answer lower than 0 then you borrow. you get a 1 behind the number mathematically, add a ten or hundred to the previous place.