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Multiply Two-Digit Numbers

Multiply Two-Digit Numbers. Unit 7 Lesson 3. Expanded Notation. Short Cut Method. Work Backward Strategy. Rectangle Rows method. 67. 43 x 67. 2 67 x 40 2,680. 2,680 + 201 2,881. 40 + 3. 2 67 x 3 201. Rectangle Rows method. Step 6.

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Multiply Two-Digit Numbers

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  1. Multiply Two-Digit Numbers Unit 7 Lesson 3 Expanded Notation Short Cut Method Work Backward Strategy Rectangle Rows method

  2. 67 43 x 67 2 67 x 40 2,680 2,680 + 201 2,881 40 + 3 2 67 x 3 201 Rectangle Rows method

  3. Step 6 Step 3 Step 4 Step 5 Step 1 Step 2 2 2 67 x 43 201 80 2 2 67 x 43 201 2,680 2,881 2 2 67 x 43 201 2,680 2 67 x 43 1 2 67 x 43 201 2 67 x 43 201 0 Short Cut Method

  4. 67 = 60 + 7 X 43 = 40 + 3 40 x 60 = 2,400 40 x 7 = 280 3 x 60 = 180 3 x 7 = 21 2, 881 Expanded Notation 60 + 7 40 + 3 40 + 3 60 + 7

  5. Short Cut method Multiply by Tens First 67 x 43 Multiply by Ones First 67 x 43 201 201 2,680 2,881 2,881 2,680

  6. 40 x 60 = 2,400 40 x 7 = 280 60 + 7 3x 60 = 180 3 x 7= + 21 40 + 3 2,881 40 + 3 60 + 7 Rectangle Sections Method

  7. Roles in Collaborative Learning

  8. Work Backward Strategy • What do I know? • What am I trying to find? • Work backwards to find the answer • Look back and check

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