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Lattice Multiplication • Single digit x single digit • Double digit x single digit • Double digit x double digit Setting up Single-Digit Lattice Multiplication 1. First write the numbers. 3 2 Setting up Single-Digit Lattice Multiplication 2. Second, draw a box. 3 2 Setting up Single-Digit Lattice Multiplication 2. Third, draw an arrow through the box. 3 2 Steps to Solve The tens go in the red box. The ones go in the teal box. 3 2 Steps to Solve The tens go in the red box. The ones go in the teal box. 3 0 2 6 Steps to Solve Follow the arrow to write the numbers. 0 3 0 6 2 6 Steps to Solve What is our answer? 0 3 0 6 2 6 Double-digit Lattice Multiplication You have to start with a number sentence: 12 x 5 = __ Setting up Double-Digit Lattice Multiplication 1. First write the numbers. 1 2 5 Setting up Double-Digit Lattice Multiplication 2. Second, draw a box. 1 2 5 Setting up Double-Digit Lattice Multiplication 3. Third, split up the double digit numbers. 1 2 5 Setting up Double-Digit Lattice Multiplication 4. Fourth, draw an arrow through each box. 1 2 5 Steps to Solve Break the problem down into single-digit problems (click): 1 2 5 Steps to Solve Solve as a single digit problem *The tens go in the red box. *The ones go in the teal box. 1 2 5 Steps to Solve Move to the second single-digit problem (click). Solve. *The tens go in the red box. *The ones go in the teal box. 1 2 5 Steps to Solve • Follow the arrow to write the numbers. Numbers that are in the same arrow space are added together. __ 0 1 2 0 +1 5 5 0 __ 6 __ 0 Steps to Solve What is the answer? __ 0 1 2 0 +1 5 5 0 __ 6 __ 0 Two Double-Digit Multiplication You start with a number sentence: 63 x 21 = __ Setting up Two Double-Digit Lattice Multiplication 1. First write the numbers. 6 3 2 1 Setting up Two Double-Digit Lattice Multiplication 2. Second, draw a box. 6 3 2 1 Setting up Two Double-Digit Lattice Multiplication 3. Third, split up the double digit numbers. 6 3 2 1 Setting up Two Double-Digit Lattice Multiplication 4. Fourth, draw an arrow through each box. 6 3 *one of the arrows should go through two boxes! ___ ___ ___ ___ 2 1 Solving a Two Double-Digit Lattice Multiplication Break the problem down into single-digit problems (click): 6 3 2 1 Solving a Two Double-Digit Lattice Multiplication Solve as a single digit problem (click) *The tens go in the red box. *The ones go in the teal box. 6 3 12 2 1 Solving a Two Double-Digit Lattice Multiplication Solve as a single digit problem (click) 6 3 *The tens go in the red box. *The ones go in the teal box. 06 2 1 Solving a Two Double-Digit Lattice Multiplication Solve as a single digit problem (click) *The tens go in the red box. *The ones go in the teal box. 6 3 2 03 1 Solving a Two Double-Digit Lattice Multiplication Follow the arrow to write the numbers. *Numbers that are in the same arrow space are added together. If an arrow space is greater than 9, you write the ones and carry the tens value. 6 3 1 2+0 6 2 + + 0 6+0 3 1 ___ ___ ___ ___ Solving a Two Double-Digit Lattice Multiplication 6 3 What is our answer? 1 2+0 6 2 + + 0 6+0 3 1 ___ 1 ___ 3 ___ 2 ___ 3