Question

You want to buy 30 calcuators that cost $ 8.80 each. Explain how solve that by using mental math and the distributive property

Answer 1

Answer:

30 × 8.8 = 30 × (8 + 0.8) = 240 + 24 = 264

Step-by-step explanation:

I want to buy 30 calculators that cost $ 8.80 each.

So, to calculate the total price, we have to multiply 8.8 with 30.

Now, we have to calculate this multiplication mentally.

To do this, we can write the multiplication as 30(8 + 0.8).

So, we can separately multiply 30 with 8 and calculate it mentally to be 240 and then multiply 30 with 0.8 and calculate it mentally to be 24 and finally add the two products.

Therefore, 30 × 8.8 = 240 + 24 = 264 (Answer)