Use place value and multiplication properties to multiply 2-digit numbers by a 2-digit tens
Estimate products by rounding or using compatible numbers
Use place value, area models, and partial products to multiply 2-digits by 2-digits
Use regrouping to multiply 2-digits by 2-digits
Solve multistep multiplication word problems
Lesson 3.1 Multiply by Tens (CC.4.NBT.5)
Lesson 3.2 Estimate Products (CC.4.NBT.5)
Lesson 3.3 Area Models and Partial Products (CC.4.NBT.5)
Lesson 3.4 Multiply Using Partial Products (CC.4.NBT.5)
Lesson 3.5 Multiply with Regrouping (CC.4.NBT.5)
Lesson 3.6 Choose a Multiplication Method (CC.4.NBT.5)
Lesson 3.7 Problem Solving - Multiply 2-Digit Numbers (CC.4.OA.3)
Associative Property of Multiplication: - the property that states that you can group factors in different ways and get the same product
ex: (6x10)x10 = 6x(10x10)
factor – a number that is multiplied by another number to find a product
product – the answer to a multiplication problem
compatible numbers - numbers that are easy to compute mentally and work well together
ex: 25 & 4
partial product – a method of multiplying in which the ones, tens, hundreds, and so on are multiplied separately and then the products are added together
estimate – a number close to an exact amount
round – to replace a number with another number that tells about how many or how much; 39 rounds to 40, 128 rounds to 100
Use the four operations with whole numbers to solve problems
CC.4.OA.3 Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Use place value understanding and properties of operations to perform multi-digit arithmetic
CC.4.NBT.5 Multiply a whole number up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.