Math

posted by .

What is the best way to use mental math to multiply (5x18)x20?

  • Math -

    well, 5 x 20 = 100
    and 100 x 18 = 1800

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    Using the breaking apart method, what is the best way to multiply 8 by 7?
  2. 3rd grade math

    How can you use mental math to multiply 800 x 5?
  3. math mental math help

    i need to use mental math and the distributive property to simplify: can you pls check if this correct?
  4. math help

    i need to use mental math and the distributive property to simplify: can you pls check if this correct?
  5. math

    multiply using mental math 25*400=
  6. math mental math

    shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?
  7. Algebra

    Explain how to use mental math to simplify the expression. a.) 8 * 3 * 2 b.) 8 * 2 + 3 c.) 5 + 8 + 3 d.) 10 * 3 -4 I have to explain the process. Example: Using the associative property of multiplication I can group 8*(3*2) so I get …
  8. History

    Reference Maps and Thematic Maps vary across the globe. Which of the following is the correct answer?
  9. Math

    Using the break apart method what is the best way to multiply 8x7
  10. Math - Help! ASAP

    8. a) Estimate 51% of 162. First, we can multiply. So, 162 x 51% = 82.62. We round it, which will be 83. b) Use mental math to calculate 51% of 162. If we round 51%, it is close to 50%. So, in that case, 50% of 162 is 81. Did I do …

More Similar Questions