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Details for problem "Semi-long multiplication by decomposition"

Quickname: 9523

Suitable for K-12 grades: Grade 3 Grade 4

Elementary School, Primary School.


Preparation for long multiplication: Multiply by decomposing first factor


Preparation for long multiplication: Multiply by decomposing first factor (Example for this math problem)


This problem is a preparation for long multiplication, in which the first factor is broken down into multiples of powers of ten according to its decimal places.

The first given factor has two to three digits, the second factor is always in the range from two to nine. The decomposition is made into the two to three digits of the first factor. The multiplication is then carried out separately for each digit, and the intermediate results for the individual digits are then added up to form the total product.

If desired, the partial products, i.e. the decomposition, can be included in the task definition. An example task that can be turned on or off is illustrating the procedure.

The number of problems can also be set.

Topics: Arithmetic Elementary arithmetic

Tags: Multiplication

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Customization options for this problem

Possible values
Number of problems
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Second factor
all, 2, 3, 4, 5, 6, 7, 8, 9
Show intermediate products
none, one, random, all
Sample problem
Yes, No

Similar problems

Name and direct link
Also available in the form of a divisional task
Divide by splitting the dividend.
In the form of a generic written multiplication task
Two factors have to be multiplied using the long multiplication written form.
As a generic multiplication task
Multiplication problems with defined number range

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