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Grade 5 Math Β· World 2: Multiplication Mountain Β· Level 12
Partial Products in a List
Write the same parts in a stack, with no drawing.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 12
- An area model takes room to draw. We can list the same parts in a stack instead. Each line is one part of the model.
- Start with the ones: 6 times 3, 6 times 40, and 6 times 200. Then do the tens: 30 times 3, 30 times 40, and 30 times 200.
- Add all the lines, and you get the same answer as the area model.
- The notes beside each line keep your thinking clear. Each one tells which parts you multiplied.
Georgia's K-12 Mathematics Standards:
- 5.NR.2.1 β Fluently multiply multi-digit (up to 3-digit by 2-digit) whole numbers to solve authentic problems.