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What are the specific inspection methods for the multiplication of two digits in the third grade of primary school?
What are the specific inspection methods for the multiplication of two digits in the third grade of primary school?

1, and then multiply the two-digit exchange positions.

2. Check by department.

For example:1/kloc-0 /×12 =132.

Check calculation:

1、 12× 1 1= 132

2、 132÷ 1 1= 12

3、 132÷ 12= 1 1

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