In this post, we’re going to explain what adding with an unknown quantity is and why it’s taught during the first years of Elementary school. Some people think it’s strange that children are taught such an important variable, like an unknown quantity, in addition problems shortly after the children have just started to get used […]

Jan 16

Jan 13
In this post we are going to learn a strategy for mental calculation which we can use when one of the two numbers is near a multiple of ten. We round the number up to that nearest multiple of ten, and then we add or subtract the digits that are left. We’re going to take […]

Jan 11
In this post, we are going to see how to subtract fractions, but for that, you first have to know what the denominator and numerator of a fraction are. The numerator is the number that is written on top of the fraction and the denominator is the number written on the bottom of the fraction. […]

Jan 09
Divisibility? What is that? Divisibility is when we divide number A by number B and the remainder is zero. In this case we say that A is divisible by B. For example, is 1368 divisible by 6? To find out we divide 1368 by 6: When we divide it we see that the remainder […]

Rounding decimals to the nearest whole number or the tenths, hundredths, thousandths is easy! In this post we are going to learn to round decimal numbers. Rounding decimals helps us to manage the numbers more easily in order to operate them. Rounding decimals to the nearest whole number To round a number to the nearest whole […]