# I want to learn about: Operations & Algebraic Thinking

• Why is it useful to know the divisibility of a number?  It allows us to determine whether a number is divisible by another number without having to divide them. In this post we are going to learn the divisibility guidelines for 9. Criteria for the divisibility by 9:   A number is divisible by 9 if […]

•   Do you remember your multiplication tables? Do you remember how to  perform 1 digit divisions? Knowing how to do these things is important for being able to solve problems involving dividing 2 digit numbers. Are you prepared to continue? Before beginning I am going to remind you the different parts of division since they will […]

•   Have you learned how to multiply with decimals yet?  Today we are going to review three different cases of multiplication with decimals. Multiplcation with decimals and whole numbers In this case we are multiplying a decimal by another number without decimals, as in the example: Step 1: We place both numbers so that the […]

• 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 + […]

• 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 […]

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