what is 8x25x23 in mental math use subtraction
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.
8 * 25 * 23 = 4,600
When multiplication is indicated, how do you use subtraction? Do you have a typo?
4600
50x10=500
8x25x23
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To calculate 8x25x23 using subtraction, you can break it down into smaller, more manageable calculations. Here's how you can approach it:
1. Start by finding the product of 8 and 25. You can do this mentally by multiplying 8 by 20 and 8 by 5 separately, and then adding them together.
8 x 20 = 160
8 x 5 = 40
160 + 40 = 200
2. Next, subtract the result from 200. Since our goal is to get to 23, we will repeatedly subtract 23 from 200 until we reach a number close to zero.
200 - 23 = 177
177 - 23 = 154
154 - 23 = 131
131 - 23 = 108
108 - 23 = 85
85 - 23 = 62
62 - 23 = 39
39 - 23 = 16
3. Finally, subtract 23 from 16, which will give you a negative result. Since we're using this method for mental math, we don't need to calculate exact negative values. Instead, we can just indicate that the value is negative.
16 - 23 = -7
So, the result of 8x25x23 using the method of subtraction is -7.