here a subtraction problem that has been solved correctly for 68-59=9 but the choices is 9+68=77 68+9=77 9+59=68 which one is th e addition sentence that checks the subtraction problem
1 answer:
Answer:
9+59=68
Step-by-step explanation:
Each subtraction problem has a dual addition problem that can be used for checking . In general, that dual problem will add the subtrahend back to the difference to get the minuend.
Here we have ...
original problem: 68 -59 = 9
dual problem for checking: 9 +59 = 68
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