example based on these method
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Use the parallelogram method to add two of the vectors to create a single vector for them;Now use this vector with another of the vectors to be added (using the parallelogram method to create another vector).Repeat until all the vectors have been added.For example, if you have to add V1, V2, V3, V4 do:Used method to add V1 and V2 to result in R1Use method to add R1 and V3 to result in R2Use method to add R2 and V4 to give final resulting vector R.
8 and 55 guess and check method was used here
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converting the percent into a decimalmake sure you put the decimal in front of the percentthen multiply or if you know this method try using the lattice method to solve the multiplication problem easierif you done the lattice method then copy down the answer after you add up and multiply
Its a method used to find out the common solution of a pair of linear equations in two variables. For it, just make the coefficients of any one term and if the coefficients are having same signs, subtract both and if they are having different signs, add them up.