Two Tier Subtraction Exercise 1

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Remember, if the number above is smaller than the number below, borrow ten.  For example in question (b), 3 is smaller than 7, so you borrow ten from 60 to make it 13.  Hence 13 - 7 = 6.  So then 6(ten) becomes 5(ten), that is because 63 = 50 + 13.  When you need to borrow 10 from a "0", that means you have to get 10 from 100.  For example in 102 = 90 + 12  Repeat where necessary.  When you are done, click Score Me to see how well you did. If you didn't get a 100%, return to the questions marked "X" and correct your answers. Then click on Score Me again. Repeat until you get all your answers correct.

       2026  

  —   691

      

       1363  

  — 1047

      

       2356  

  — 1011

      

       1372  

  —   548

      

       1405  

  —   106

      

       1137  

  —   203

      

       2066  

  — 1032

      

         668  

  —   258

      

       1179  

  —   221

      

       1993  

  —   766

      

 

   out of 10, which is % correct.

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