﻿ NLVM 6 - 8 - Number & Operations Manipulatives     Number & Operations (Grades 6 - 8)

Virtual manipulatives for Number & Operations, grades 6 - 8. Abacus – An electronic abacus that can be used to do arithmetic. Base Blocks – Illustrate addition and subtraction in a variety of bases. Base Blocks Addition – Use base ten blocks to model grouping in addition. Base Blocks Decimals – Add and subtract decimal values using base blocks. Base Blocks Subtraction – Use base ten blocks to model separation of groups in subtraction. Chip Abacus – Learn about carrying and digits using chips. Circle 0 – A puzzle involving adding positive and negative integers to sum to zero. Circle 21 – A puzzle involving adding positive and negative integers to sum to twenty one. Circle 3 – A puzzle involving adding positive real numbers to sum to three. Circle 99 – A puzzle involving adding positive and negative integers to sum to ninety nine. Color Chips - Subtraction – Use color chips to illustrate subtraction of integers. Conway's Game of Life – Discover the rules that determine change in these simulations. Diffy – Solve an interesting puzzle involving the differences of given numbers. Dueling Calculators – Visualize a dramatic simulation of the effect of propagating rounding errors. Factor Tree – Factor numbers using a tree diagram. Fibonacci Sequence – Explore the Fibonacci sequence and the golden ratio. Fraction Pieces – Work with parts and wholes to learn about fractions. Fractions - Adding – Illustrates what it means to find a common denominator and combine. Fractions - Comparing – Judge the size of fractions and plot them on a number line. Fractions - Equivalent – Illustrates relationships between equivalent fractions. Fractions - Rectangle Multiplication – Visualize and practice multiplying fractions using an area representation. Function Machine – Explore the concept of functions by putting values into this machine and observing its output. Golden Rectangle – Illustrates iterations of the Golden Section. Grapher – A tool for graphing and exploring functions. Mastermind – Use inference and logic to play a game and guess a hidden pattern of pegs. Money – Learn about money by counting and making change. Number Line Bars - Fractions – Divide fractions using number line bars. Number Line Bounce – Number line addition and subtraction game. Number Puzzles – Solve puzzles involving arranging numbers on a diagram so that they add up to a given value. Pascal's Triangle – Explore patterns created by selecting elements of Pascal's triangle. Peg Puzzle – Win this game by moving the pegs on the left past the pegs on the right. Percent Grids – Represent, name, and explore percentages using hundreds grids. Percentages – Discover relationships between fractions, percents, and decimals. Sieve of Eratosthenes – Relate number patterns with visual patterns. Spinners – Work with spinners to learn about numbers and probabilities. Tangrams – Use all seven Chinese puzzle pieces to make shapes and solve problems. Tight Weave – Visualize the creation of the Sierpinski Carpet, an iterative geometric pattern that resembles a woven mat. Turtle Geometry – Explore numbers, shapes, and logic by programming a turtle to move. Venn Diagrams – Investigate common features of sets.