WebFeb 19, 2010 · With those as background (or at least Devlin's first column on this issue, "It Ain't No Repeated Addition," from June 2008), let me try to extend the discussion. Devlin's first column closes with the plea, "In the meantime, teachers, please stop telling your pupils that multiplication is repeated addition." WebLesson 2: Add using arrays. Adding with arrays. Adding with arrays. Using arrays in word problems. Repeated addition: haircuts. Array word problems. Math >. 2nd grade >. Add and subtract within 20 >.

Rethinking Fractions – Standards Explained

In the early 1990s Leslie Steffe proposed the counting scheme children use to assimilate multiplication into their mathematical knowledge. Jere Confrey contrasted the counting scheme with the splitting conjecture. Confrey suggested that counting and splitting are two separate, independent cognitive primitives. This sparked academic discussions in the form of conference presentations, articles and book chapters. WebThe answer is nothing. It has no units. In this case, the 3.8 is a dimensionless scaling factor. Incidentally, even when the initial length of the band and the scaling factor are positive integers, it makes no sense to view this example as one of repeated addition. css on input box

Multiplication, What is It? - Mathematics Stack Exchange

WebIt Ain't No Repeated Addition (Snippet from June 2008) ... and the actual calculation of multiplication and division sums can be done through repeated addition and … WebNov 12, 2024 · Task 1: Play with the number lines: Set different scale factors (n = 2, d = 1 is a good start).Show the control points and experiment to find out what they do. Task 2: Use these number lines to illustrate two multiplication problems: (a) multiply two whole numbers, and (b) multiply a whole number by a fraction. WebDevlin is an unusual given name for males but a very prominent last name for all people (#2664 out of 150436, Top 2%). (2000 U.S. DEMOGRAPHICS) Devlin was first listed in … earlshansford gmail.com