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Explain how to decompose the large rectangle into 312 groups with 412 squares in each group...

Explain how to decompose the large rectangle into 312 groups with 412 squares in each group so as to describe the area of the rectangle as 312x 412 cm².

b) Calculate 312x 412 without a calculator showing your calculations.

c) Verify that your answer in (b) is the same as that in (a).

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