Answer:
8:
Let's round each of the number to the nearest 10.
will become
, since it's near to it.
And
will become
.
So, the product will be:
We can calculate this to be:
Since we rounded all the numbers to greater numbers than they were, this product is thus an overestimate.
9:
Let's round each of the number to the nearest 100.
will become
, since it's near to it.
And
will become
.
So, the product will be:
We can calculate this to be:
Since we rounded all the numbers to lesser numbers than they were, this product is thus an underestimate.
10:
Let's round the price of the bowl to the nearest 10.
So,
will become
.
So, the total estimated price of the bowls will be:
Since we rounded the price to a lesser value than it was, the overall product is an underestimate.