We examined how children's strategy choices in solving complex subtraction problems are related to grade and to variations in problem complexity. In two studies, third- and fifth-grade children (N≈160 ...
Diagnostic items can be designed to collect specific and fine-grained information about students’ cognitive strengths and weaknesses (Leighton and Gierl, 2007; Keeley and Tobey, 2011; van der Kleij et ...
When solving subtraction problems such as 83-46, children use the direct subtraction (DS) strategy (e.g., 83 - 40 = 43, 43 - 6 = 37) or the subtraction by addition (SBA) strategy (e.g., 46 + 4 = 50, ...
Children apply various strategies to mentally solve multi-digit subtraction problems and the efficient use of some of them may depend more or less on numerical magnitude processing. For example, the ...
My son needed a way to practice his math, and I was working & attending school, so I came up with this. It generates two random 3-digit numbers as arguments for the equation. It also randomly ...
Karen C. Fuson, Diana Wearne, James C. Hiebert, Hanlie G. Murray, Pieter G. Human, Alwyn I. Olivier, Thomas P. Carpenter, Elizabeth Fennema Researchers from 4 projects with a problem-solving approach ...
Subtraction is when you take away a number or an amount from another number or amount to work out what is left. There are different things you can use to help you subtract. You can use number lines, ...
Ralph van Dijk has the questions and the subject of today's quiz is the addition and subtraction of two-digit numbers. Read more ...
There was an error while loading. Please reload this page. This project is a simple web application designed to generate random math problems, including both addition ...
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