Question

Arthur exercises every day. Today, he did 78 sit-ups which is 15 more than he usually

does. How many sit-ups does Arthur usually do? Write and solve the addition equation
that represents this situation.

Answer 1

Let x be the number of sit-ups Arthur usually does.
Then the equation is: x + 15 = 78
Subtracting 15 from both sides, we get: x = 63
Therefore,

Arthur usually does 63 Sit-ups

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