• Revision 1 Week 14
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  • Calculate vertically: 50 - 18
    32
  • Write 3 additions that have the sum is 50. (Viết 3 phép cộng có tổng bằng 50)
    25 + 25 = 50 ; 10 + 40 = 50; 30 + 20 = 50
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