### Unit 4

Fifth Grade Mathematics
Unit 4
Whole Number Division

Printable Parent Letter

 During Unit 4, your child will develop the following understandings for division: There are two common situations where division may be used: fair sharing (given the total amount and the number of equal groups, determine how many/much in each group) and measurement (given the total amount and the amount in a group, determine how many groups of the same size can be created). Some division situations will produce a remainder, but the remainder will always be less than the divisor. If the remainder is greater than the divisor, that means at least one more can be given to each group (fair sharing) or at least one more group of the given size (the dividend) may be created. The quotient remains unchanged when both the dividend and the divisor are multiplied or divided by the same number. The properties of multiplication and division help us solve computation problems easily and provide reasoning for choices we make in problem solving. Students need to: 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.   Convert among different-sized standard measurement units within a given measurement system (e.g., convert 5 cm to 0.05 m), and use these conversions in solving multi-step real world problems. Carroll County Public Schools Video Support   Divison with Area Models Division with Open Arrays Division with Partial Quotients Ways Parents Can Help Some Support Sites

 Key Vocabulary to Know dividend divisor quotient remainder