Homework Explained - Math Practice 101

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Grade 4 HMH Go Math - Answer Keys
Common Core - Read and Write Numbers


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  • Question 1 (request help)

    The International Space Station uses 262,400 solar cells to change sunlight to electricity. Write 262,400 in standard form, word form, and expanded form. 

    Use a place-value chart. Each group of three digits separated by a comma is called a period. Each period has hundreds, tens, and ones. The greatest place-value position in the thousands period is hundred thousands.

    Write 262,400 in the place-value chart below.

Use place value to read and write numbers.

  • Question 2 (request help)
    Word Form: ninety-two thousand,one hundred seventy
  • Standard Form:    
    Expanded Form: 90,000 + 2,000 +     + 70
  • Question 2 (request help)
    Standard Form: 200,007
  • Word Form: two hundred    
    Expanded Form:    + 7

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