Eureka Math Grade 4 Module 3 Lesson 9 - Multiply 3 & 4 dig Numbers by 1 digit - Standard Algorithm

A walkthrough of Eureka Math / Engage NY / Zearn's 4th Grade Module 3 Lesson 9 - Multiply three and four digit numbers by one-digit numbers applying the standard algorithm.
STANDARDS ALIGNMENT:
CC.2.2.4.A.1
Represent and solve problems involving the four operations.
M04.B-O.1.1.1 Interpret a multiplication equation as a comparison. Represent verbal statements of multiplicative comparisons as multiplication equations.
M04.B-O.1.1.2 Multiply or divide to solve word problems involving multiplicative comparison, distinguishing multiplicative comparison from additive comparison
M04.B-O.1.1.3 Solve multi-step word problems posed with whole numbers using the four operations.
CC.2.1.4.B.2
Use place value understanding and properties of operations to perform multi-digit arithmetic.
M04.A-T.2.1.2 Multiply a whole number of up to four digits by a one-digit whole number and multiply 2 two-digit numbers.