WA.4.1. Core Content: Multi-digit multiplication (Numbers, Operations, Algebra) Students learn basic multiplication facts and efficient procedures for multiplying two- and three-digit numbers. They explore the relationship between multiplication and division as they learn related division and multiplication facts in the same fact family. These skills, along with mental math and estimation, allow students to solve problems that call for multiplication. Building on an understanding of how multiplication and division relate to each other, students prepare to learn efficient procedures for division, which will be developed in fifth grade. Multiplication of whole numbers is not only a basic skill, it is also closely connected to Core Content in this grade level on area, and this connection reinforces understanding of both concepts. Multiplication is also central to students' study of many other topics in mathematics across the grades, including fractions, volume, and algebra.
4.1.C. Represent multiplication of a two-digit number by a two-digit number with place value models.
4.1.F. Fluently and accurately multiply up to a three-digit number by one- and two-digit numbers using the standard multiplication algorithm.