In this topic, students will:
use place-value understandings and patterns to mentally multiply whole numbers and powers of 10
use rounding and compatible numbers to estimate products
use place value and the standard algorithm to multiply multi-digit numbers by 1-digit numbers
use the expanded and the standard algorithm to multiply 2-digit by 2-digit numbers. Estimate to check if products are reasonable
multiply 3-digit by 2-digit numbers by adding partial products or by using the standard algorithm
use knowledge about place value and multiplying with 2-digit and 3-digit numbers to multiply with zeros
use properties and the standard algorithm for multiplication to find the product of multi-digit numbers
use models and strategies to solve word problems
Vocabulary:
Underestimate - the result of using lesser numbers to estimate a sum or product.
Overestimate - the result of using greater numbers to estimate a sum or product.
Partial products - products found by breaking one of two factors into ones, tens, hundreds, and so on, and then multiplying each of these by the other factor.
Variable - a letter, such as n, that represents a number in an expression or an equation.