4.A.1.b
Multiply up to a four-digit whole number by a one-digit whole number and multiply a two-digit whole number by a two-digit whole number, using strategies based on place value, properties of operations, and algorithms.
Example Problems
Khan Academy ResourcesMultiply without regroupingMultiply with regroupingMultiply 2-digit numbersMultiply using partial productsCompare with multiplication word problemsMultiply 2-digits by 1-digit with area modelsMultiply 2-digit numbers with area modelsMultiply with partial products (2-digit numbers)Multiplying 10sMultiply 3- and 4-digits by 1-digit with area modelsMultiply 3- and 4-digits by 1-digit with distributive propertyMultiply 2-digits by 1-digit with distributive propertyComparing with multiplication: magicMultiplying with area model: 78 x 65Multiplying two 2-digit numbers using partial productsMultiplying 3-digit by 1-digit (regrouping)Multiplying 3-digit by 1-digitMultiplying with area model: 16 x 27Multiplying 10sMultiplying 2-digit numbersMultiplying 2-digits by 1-digit with partial productsUsing area model and properties to multiply Multiplying with area model: 6 x 7981

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