Conditions:
- The multiplicand is a two digits number.
- The multiplier is 33.
Note:
Before this, we have learned a trick on how to multiply a two digits number by 99. Therefore, when multiplying a number by 33, we may convert 33 to 99/3. Since multiplying a number by 99 can be done easily, hence this calculation can be completed easily.
Example 1:
78 x 33 = ?
Answer:
Note: 78 is a multiple of 3. Therefore, you are advised to divide 78 by 3 before moving on to the multiplication.
78 x 33 = ?
Answer:
Note: 78 is a multiple of 3. Therefore, you are advised to divide 78 by 3 before moving on to the multiplication.
Example 2:
267 x 33 = ?
Answer:
Even though 267 is not a two digits number, it can still be solved by using this trick because it is a multiple of 3, and after divided by 3, it is reduced to 87, which is a two digit number.
267 x 33 = ?
Answer:
Even though 267 is not a two digits number, it can still be solved by using this trick because it is a multiple of 3, and after divided by 3, it is reduced to 87, which is a two digit number.
Example 3:
47 x 33 = ?
Answer:
47 is not a multiple of 3. Therefore you are advised to do the multiplication first, then only divide the product by 3.
47 x 33 = ?
Answer:
47 is not a multiple of 3. Therefore you are advised to do the multiplication first, then only divide the product by 3.
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