Today, we present our five tricks for Addition. They are super helpful and will help you add faster, getting the answer right every time. 1. Count from the number Start with one of the numbers and keep counting onwards. For example: 7 + 2 Start on 7 Count 2 more…until you hit 9 So, 7 + […]

Feb 08

Feb 03
Today we will be learning to use “borrowing,” (sometimes called “regrouping”) in a subtraction problem. In order to do this we will remember how the elements of a subtraction are placed: Place the number being subtracted under the number being subtracted from so that place values in the same column match. Subtract each column separately starting […]

Jan 16
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 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 […]

Dec 14
In this post, we are going to learn how to add decimal numbers. For example: 52.7 + 4.6 The most important thing about adding decimals is to put the decimal numbers in the correct position. For this, we have to align the decimals and be sure all digits of the same place value are […]
I want to learn about: Addition and Subtraction
Contenido generado sobre sumas y restas de matemáticas de primaria