题目内容

写出差是9的减法算式,你能写出多少道?

(  )-(  )=9  (  )-(  )=9  (  )-(  )=9

(  )-(  )=9  (  )-(  )=9  (  )-(  )=9

(  )-(  )=9  (  )-(  )=9  (  )-(  )=9

(  )-(  )=9  (  )-(  )=9  (  )-(  )=9

8________________________

7________________________

6________________________

答案:
解析:

(  9 )-( 0 )=9  ( 13 )-( 4 )=9  ( 17 )-( 8 )=9

( 10 )-(  1 )=9  ( 14 )-( 5 )=9  ( 18 )-( 9 )=9

( 11 )-( 2 )=9  ( 15 )-( 6 )=9  ( 19 )-( 10 )=9

( 12 )-(  3 )=9  ( 16 )-( 7 )=9  ( 20 )-( 11 )=9

10-2=8 9-1=8 12-4=8

13-6=7 11-4=7 25-18=7

12-6=6 10-4=6 7-1=6


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