competition success review Published this article page no 2 Base ten blocks can be used to add and subtract integers. To accomplish this, two colours of base ten blocks are required - one colour for negative numbers and one colour for positive numbers. The zero principle states that an equal number of negatives and an equal number of positives add up to zero. To add using base ten blocks, represent both numbers using base ten blocks, apply the zero principle and read the result. For example (-51) + (+42) could be represented with 5 red rods, 1 red cube, 4 blue rods, and 2 blue cubes. Immediately, the student applies the zero principle to four red and four blue rods and one red and one blue cube. To finish the problem, they trade the remaining red rod for 10 red cubes and apply the zero principle to the remaining blue cube and one of the red cubes. The end result is (-9).Subtracting means taking away. For instance, (-5) - (-2) is represented by taking two red cubes from a pile of five red cubes. If you cant take away, the zero principle can be applied in reverse. You cant take away six blue cubes in (-7) - (+6) because there arent six blue cubes. Since a blue cube and a red cube is just zero, and adding zero to a number doesnt change it, simply include six blue cubes and six red cubes with the pile of seven red cubes competition success review magazine buy.
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