Math Games

Grade 5 - Number

Standard 5.N.2 - Solve multiplication word problems with numbers up to 1000.

Included Skills:

Analyze models of, develop strategies for, and carry out multiplication of whole numbers.
• Describe mental mathematics strategies used to determine multiplication facts to 81 (e.g., skip counting from a known fact, doubling, halving, 9s patterns, repeated doubling, or repeated halving).
• Explain concretely, pictorially, or orally why multiplying by zero produces a product of zero.
• Recall multiplication facts to 81 including within problem solving and calculations of larger products.
• Generalize and apply strategies for multiplying two whole numbers when one factor is a multiple of 10, 100, or 1000.
• Generalize and apply halving and doubling strategies to determine a product involving at least one two-digit factor.
• Apply and explain the use of the distributive property to determine a product involving multiplying factors that are close to multiples of 10.
• Model multiplying two 2-digit factors using an array, base ten blocks, or an area model, record the process symbolically, and describe the connections between the models and the symbolic recording.
• Pose a problem which requires the multiplication of 2-digit numbers and explain the strategies used to multiply the numbers.
• Illustrate, concretely, pictorially, and symbolically, the distributive property using expanded notation and partial products (e.g., 36 x 42 = (30 +6) x (40+2) = 30 x 40 + 6 x 40 +30 x 2 + 6 x 2).
• Explain and justify strategies used when multiplying 2-digit numbers symbolically.