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softballgirl6 softballgirl6
  • 29-09-2014
  • Mathematics
Answered

Explain how using basic facts can help you find 10x20x30x40 mentally

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djpatel1 djpatel1
  • 29-09-2014

Hi Softballgirl6! I would say that first, we could pretend that the zeros don't exist because we could add those in later. Then just working with 1x2x3x4, we could mentally solve this to 24 and then add in the extra 4 zeros that we left out at the beginning. This brings the answer to 240000. Hope this helps! :)

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thekid100000
thekid100000 thekid100000
  • 29-09-2014

123410000
6410000
24*10000
240000

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