1. Add the 3 to the 5 and get 8.  Then you can take that

together with the one you didn't use in the addition, which 

is the 4, and you can make the two two-digit numbers 48 and 84.



2. Add the 3 to the 4 and get 7.  Then you can take that

together with the one you didn't use in the addition, which 

is the 5, and you can make the two two-digit numbers 57 and 75.



3. Add the 5 to the 4 and get 9.  Then you can take that

together with the one you didn't use in the addition, which 

is the 3, and you can make the two two-digit numbers 39 and 93.



Edwin

 

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