Mathematics · Grade 4

Column addition and subtraction of multi-digit numbers

• Adding & Subtracting Across Zeros
• Column Regroup
• Subtraction Error Hunt

Check ± by estimate and inverse

• Checking Your Answer
• Inverse Detective

Add and subtract decimals in columns

• Column Addition & Subtraction with Decimals
• Line Up the Point

Multiply 3- and 4-digit numbers by 1 digit

• Carry the Crate
• 3-Digit by 1-Digit Multiplication
• Area Model

Introduce 4-digit × 2-digit

• Area Model
• Long Multiplication
• Partial Product Lanes

Multiply and divide a decimal by a whole number

• Multiplying & Dividing Decimals
• Decimal Times Whole

Divide up to 4 digits by 1 digit

• Division with Remainders
• Share Out
• Short Division Stairs

Decide what to do with a remainder

• What About the Remainder?
• Remainder Stories

Introduce division by a 2-digit number

• Long Division & Remainders
• Chunking

"Times as many" versus "more than"

• Times As Many or More Than?
• Times or More?

Distributive and associative properties

• Smart Multiplying
• Regroup the Factors
• Split and Multiply Builder

Order of operations without brackets

• Order Error Hunt
• Order of Operations Race

Brackets in expressions

• Bracket Bonanza
• Bracket or Not?

Multiply 2-digit by 2-digit

• Area Model
• Box Method