1. Now let's first see what this would be added together.
1.5 + 3 + 4 = 8.5
And multiplied:
1.5 * 3 * 4 = 18
So basically, here, we can multiply by a decimal to decrease the multiply and increase the add, because if we increased the number, the multiplication would increase at a much larger scale.
So here, let's see what 18 * .5 is.
It's 9.
And 8.5 + 0.5 is 9.
So the fourth item was priced at 50 cents.
3. So if Deion Sander's 60 yard-dash time of 5.6 seconds was three times faster then Larry Lewis', we can first convert 60 yards to 100 yards.
It's 10/6 times more.
So we can just multiply 5.6 by 10/6.
5.6 * 10/6 = 56/6 = 28/3
Now since it's three times slower then that,
28/3 * 3 = 28
So he ran the 100 yard dash in 28 seconds.