| What will be covered in Unit 2? Devising an estimation strategy to solve a problem for which finding an exact answer is impossible. Reviewing place-value concepts for whole numbers and decimals; and addition using the partial-sums and column-addition methods. Subtraction of multi-digit whole numbers and decimals by using the trade-first and partial-differences methods. Reviewing a guide for solving number stories and concepts about number sentences; and using open sentences as aids in solving number stories. A review of statistical landmarks to describe experimental data. A review of vocabulary associated with chance events; an introduction to the Probability Meter Poster; and estimating the probability of an event. Making magnitude estimates for products of multidigit whole numbers, including decimals. Using the partial-products method to multiply multidigit whole numbers, and introducing products of decimals. A review of the lattice method for multiplication of whole numbers and decimals. Understanding the relative sizes of 1 million, 1 billion, and 1 trillion; and making an informed estimate from a sample of experimental data. |