Great for supporting the development of number sense.Example: How many ways can you make the sum of 7 (4 red and 3 white, 5 red and 2 white, etc.) One thing I love to do with the Rekenrek is to push the red beads to the left and the white beads to the right and have students show me how many ways they can come up with a sum (by pushing the beads to the center). You also move the beads to the left and read it from left to right.
#Rekenrek vs abacus how to#
I put a sticker on the right side of the Rekenrek to help students know how to clear it.
Like the abacus, this is cleared to the right (I like to do red in the lead).This is also known as a Two-Bar Rekenrek, Twenty Math Rack, and Twenty Number Rack. What is a Rekenrek?Ī Rekenrek usually has a total of 20 beads in two rows, with 5 in red and 5 in white on each row. Learn more about the Abacus here in this two-part blog series: Abacus Fun: Part One and Abacus Fun: Part Two. The inner and outer faces of the frame are painted blue for easier visibility. The bead color changes after the first five beads. This unit features 10 bars, each containing 10 beads (100 beads total). Use the Ten-Bar Demonstration Rekenrek to teach numbers up to 100.Great for supporting the development of number sense, rekenreks are visual models that encourage students to subitize, think of numbers in groups, strengthen counting proficiency, develop addition and subtraction strategies, and gain a better understanding of number relationships.You move the beads to the left and read it from left to right. An abacus is cleared with all of the beads to the right (I like to put a sticker or a sharper marker smiley face on the right corner of the abacus to help children know when it is cleared).It sometimes has one solid color per row, or the ones that I prefer have 5 red beads and 5 white beads. My new fan favorite is this awesome demo abacus! It uses large beads and you can do endless math concepts on it (addition, subtraction, multiplication, division, fractions, decomposing and composing, place value, and more). Basically, this tool has 100 beads on it. It is also known as Ten Bar Rekenrek, 100 Number Rack, and 100 Math Rack. we use the Danish Abacus as it works with our base-ten system (with 100 beads). Guess what? It is the same thing! So let’s get the lingo straight! What is an abacus? Most of you have heard of an abacus then the other day I saw it called a Ten Bar Demonstration Rekenrek. 1.In math today, it seems like you finally understand what a new math tool is called and then you hear a new name and wonder if it is the same thing or something completely different. So, this post is all about the different types of abacus and their uses. To understand the abacus, its really important to learn about its beginning and how it reached its current state.
#Rekenrek vs abacus series#
It had gone through series of modifications in different period of time, at different parts of the world leading to what we call ‘School Abacus’ that we use today. Types of AbacusĪbacus is not a new invention, it dates back to 2700–2300 BC in the Mesopotamian period as a form of Sumerian abacus. Practicing 10-15 minutes daily can effectively build your math calculative skills. Numbers are physically constructed and manipulated in Abacus. It is consider one of the best way to develop number sense.
#Rekenrek vs abacus manual#
Abacus is used all over the world as one of the important measures to develop mental math abilities.įor all of you who still don’t know what we are talking about, Abacus is a manual aid to calculating that consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame. It follows an interactive approach to train your mind with maths fundamentals to a whole new level. Abacus is one of the most remarkable innovation in the education industry that the human kind has ever achieved.
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