Multiplying by 429
To multiply a multiple of 7 by 429, perform the following:
• Divide the number by 7.
• Multiply the number by 3.
• Write the result on the right, using three digits. Then
write the result on the left.
Example:
14 Ã— 429 =
Solution:
• 14 Ã· 7 = 2
• 2 Ã— 3 = 6
• Write 006 as 6 is the result and you must use
threedigits. Then write the 6 on the left. The final answer is
6006.
Answer:
14 Ã— 429 = 6006.
Example:
84 Ã— 429 =
Solution:
• 84 Ã· 7 = 12
• 12 Ã— 3 = 36
• Write 036 on the right (using three digits). Then write
36 on the left. The final answer is 36036.
84 Ã— 429 = 36036.
Note: This trick works because .
