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The use of true, false, and open number sentences can go a long way toward getting students thinking about the properties of number and operations and the meaning of the equals sign. Research areas in early algebra include use of representations, such as symbols, graphs and tables; cognitive development of students; viewing arithmetic as a part ...
The nth pentagonal number p n is the number of distinct dots in a pattern of dots consisting of the outlines of regular pentagons with sides up to n dots, when the pentagons are overlaid so that they share one vertex. For instance, the third one is formed from outlines comprising 1, 5 and 10 dots, but the 1, and 3 of the 5, coincide with 3 of ...
The user must identify the pattern to find the missing number (for example, if the problem presented is "5, 10, 15, _, 25", then the missing number is 20). Estimation - the user must round numbers to estimate the answer. Fractions/decimals/percents - the user must solve problems that involve fractions, decimals and percentages.
Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The n th triangular number is the number of dots in the triangular arrangement with n dots on each side, and is equal to the sum of the n natural numbers from 1 to n. The sequence of triangular numbers, starting with the 0th triangular number, is
a number represented as a discrete r-dimensional regular geometric pattern of r-dimensional balls such as a polygonal number (for r = 2) or a polyhedral number (for r = 3). a member of the subset of the sets above containing only triangular numbers, pyramidal numbers , and their analogs in other dimensions.
Fundamental (or rudimentary) numeracy skills include understanding of the real number line, time, measurement, and estimation. [6] Fundamental skills include basic skills (the ability to identify and understand numbers) and computational skills (the ability to perform simple arithmetical operations and compare numerical magnitudes).