In this unit students will review third grade standards to fluently multiply and divide within 100 and continue to build understanding of the relationship between multiplication and division, and the properties of operations. For multiplication students will begin with two-digit by one-digit factors. In division students should begin with two-digit dividends and one-digit divisors. Later, students will find products of four-digit by 1 digit and two-digit by two-digit factors and quotients and remainders with up to four-digit dividends and one-digit divisors. Students will be asked to assess the reasonableness of answers using mental computation and estimation strategies, including rounding. Students will use their understanding of place value and properties of operations to fluently add and subtract multi-digit numbers. Fourth graders will illustrate and explain their calculation by using equations, rectangular arrays, and/or area models. Students will gain familiarity with factors and multiples in this unit. They will be able to determine if a number is prime or composite. Fourth graders will also generate and analyze patterns.
Does your fourth grader multiply two digit numbers (or larger)? - Video
Prime and Composite Numbers - Interactive STUDY JAM showing strategies for solving number patterns.
These are vocabulary words that students will be exposed to throughout the unit.