use mental math to find each value cost of 8 items at $12.98 each
At $13 each, 8 items cost $104.
At $12.98 (2 cents less than $13), we just have to deduct 8*2=16 cents from $104 to get $103.84.
To find the total cost of 8 items at $12.98 each using mental math, you can use the distributive property of multiplication. Here are the steps:
1. Break down the number $12.98 into its components: $10 and $2.98.
2. Multiply $10 by 8: $10 x 8 = $80.
3. Multiply $2.98 by 8: $2.98 x 8 = $23.84.
4. Add the two results together: $80 + $23.84 = $103.84.
Therefore, the total cost of 8 items at $12.98 each is $103.84.
To use mental math, we can round the prices to make the calculations easier. In this case, let's round $12.98 to $13.
We need to find the cost of 8 items at $13 each. To do this mentally, we can use multiplication.
1. First, find the product of 8 and the rounded price of $13:
8 * 13 = 104
So, the total cost of 8 items at $13 each comes out to $104.
Remember that this method is an approximation because we rounded the numbers, but it should give you a close estimate.