How To Add 2 and 3 Digit Numbers on an Abacus?

To add and subtract 2 and 3 digit numbers or even higher multi-digit numbers is the same as if we are working with single digit numbers. We use all the same techniques we learned in our basic skill training. We are now beginning to see the power of abacus math since although the numbers are

Abacus Math Program – Lesson 16 – Reverse Double Rod

In Lesson 11 we looked at the Forward Double Rod movement for addition problems. Now let’s take a look at the Reverse Double Rod movement for subtraction. The double rod movement for subtraction is exactly the same as for addition with the only difference using the 10 pair subtraction rule instead. Again we will repeatedly use the

Abacus Math Program – Lesson 15 – Forward Double Rod

Here we will explore the final bead movement in our basic skill training program that looks at executing the 10 pair addition rule twice across two adjacent rods, called the Forward Double Rod. We discussed in Lesson 13 and Lesson 14 the idea of repeatedly using the same basic bead movements over and over again

Abacus Math Program – Lesson 14 – Reverse Double Five

In Lesson 13 we explored the Forward Double Fives in the forward direction for addition. Now let’s take a look at the double fives in the reverse direction for subtraction. We will use the exact same technique but this time we will perform the 10 pair subtraction rule using two 5 pair movements. Let’s work through some

Abacus Math Program – Lesson 13 – Forward Double Five

To this point in our abacus skill training we have introduced all of the basic bead movements required to perform any addition or subtraction problem. To take on problems with larger number sizes, i.e. more digits per number, we will learn how to repeatedly use the basic bead movements over and over again to handle larger