4.NBT.5

In this standard, students are expected to multiply two whole numbers using strategies based on place value, properties, and visual models. Students must be able to explain the strategy they are using.

Example:

2,384 x 5 = 11,920

2,000 x 5 = 10,000

300 x 5 = 1,500

80 x 5 = 400

4 x 5 = 20

Example:

85 x 79 = 6,715

80 x 70 = 5,600

80 x 9 = 720

70 x 5 = 350

5 x 9 = 45

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