Short multiplication

Use short multiplication to multiply 3-digit but 1-digit numbers.

Use short multiplication to multiply 4-digit but 1-digit numbers.

Use rounding to approximate.

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Rounding first then esimating.

Multiplication estimation example

Multiplying with 3-digit numbers.

Multiplying a 3 digit number by a 1 digit number using grid method

Area model 3 digit by 1 digit mult

Multiplying: 3 digits times 1 digit | Multiplication and division (No carrying)

Multiplying: 3 digits times 1 digit (with carrying)

Now let’s do with with 4-digit numbers.

Multiplying: 4 digits times 1 digit (using grid)

Multiplying: 4 digits times 1 digit (with carrying)

You can use short multiplication to multiply 3-digit but 1-digit numbers and 4-digit but 1-digit numbers. In addition, you can use rounding to approximate. Now you can complete today’s multiplication worksheets.