4.NBT.B.5

Multiply a whole number of 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.

Khan Academy Resources

Multiply without regroupingMultiply with regroupingMultiply 2-digit numbersUnderstand multiplying by a multiple of 10, 100, and 1000Multiply using partial productsMultiply 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 1-digit numbers by 10, 100, and 1000Estimate products (2-digit numbers)Multiply 3- and 4-digits by 1-digit with distributive propertyMultiply 2-digits by 1-digit with distributive propertyMultiply 1-digit numbers by a multiple of 10, 100, and 1000Estimate products (1-digit times 2, 3, and 4-digit)Estimating with multiplicationMultiplying with area model: 78 x 65Multiplying two 2-digit numbers using partial productsMultiplying 3-digit by 1-digit (regrouping)Multiplying 3-digit by 1-digitEstimating 2-digit multiplicationMultiplying with area model: 16 x 27Multiplying 1-digit numbers by 10, 100, and 1000Multiplying 10sMultiplying 2-digit numbersMultiplying 2-digits by 1-digit with partial productsUsing area model and properties to multiply Multiplying 1-digit numbers by multiples of 10, 100, and 1000Multiplying with area model: 6 x 7981

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