Operations

Front

Algorithm

Back

A specific set of steps that allows the user to reach the correct answer every time.

Front

Algorithm: Column Addition

Back

Algorithm for solving addition. Align numbers based on place value and then add each column.

Front

Algorithm: Column Division

Back

Algorithm for solving division. Separate the problem into columns and work with each place value separately.

Front

Algorithm: Counting Up

Back

Algorithm for solving subtraction. Start with the number that is being subtracted and count up to the original amount with each step looking for the next base-10 number.

Front

Algorithm: Lattice Multiplication

Back

Algorithm for solving multiplication. Draw a lattice with diagonals in each box, write one factor across the top and one along the right side, multiply each number, and write the answer in the box with the tens digit on top. Add the diagonals beginning in the bottom right corner.

Front

Algorithm: Left-to-Right Subtraction

Back

Algorithm for solving subtraction. Subtract each place value separately beginning with the largest and working to the smallest.

Front

Algorithm: Modified Repeated Addition

Back

Algorithm for solving multiplication. Using the concept that multiplication is repeated addition, students use base-10 numbers to multiply and add.

Front

Algorithm: Opposite Change Rule

Back

Algorithm for solving addition. Add a number to one addend to make a number ending in zero and subtract the same amount from the other addend.

Front

Algorithm: Partial Products

Back

Algorithm for solving multiplication. Expand each factor into hundreds, tens, ones, etc., and then multiply and add.

Front

Algorithm: Partial Quotients

Back

Algorithm for solving division. First estimate the answer using base-10 numbers and then keep estimating until the remainder is less than the dividend.