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Multi-Digit Multiplication with Friendly Factors

Multiply mentally: decompose a factor, then reorder the parts (commutative property) to make a friendly product — like the example. Show your thinking.

Example16 × 5 = 16 × (10 ÷ 2) = (16 ÷ 2) × 10 = 80
  1. 1.16 × 5 =
  2. 2.36 × 125 =
  3. 3.46 × 50 =
  4. 4.32 × 50 =
  5. 5.76 × 50 =