Information and Resources:
Standards/Essential Questions:
- 5.OA.A.1
Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols. - 5.OA.A.2
Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation "add 8 and 7, then multiply by 2″ as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product. - 5.NBT.A.2
Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10. - 5.NBT.B.5
Fluently multiply multi-digit whole numbers using the standard algorithm. - 5.NBT.B.6
Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models
Big Ideas:
This unit focuses on the operations of multiplication and division. Students refine their strategies for solving multiplication problems with 2-digit numbers, and use the relationship between multiplication and division to develop and practice strategies for solving division problems.
Investigation Resources:
Multiple Towers
Unmarked Arrays
Multiplying More than Two Numbers
Multiples
Multiplication Combinations
Factors
Multiplication Strategies
Multiplication and Division Clusters
Remainders: What do you do with the extras?
Multiplication and Division
Mathematical symbols and notation