MathCastle
Grade 5SuperchallengeOrder of Operations

Order of Operations · Superchallenge problem

Find the value of 1+2−3+4+5−6+7+8−9+⋯+28+29−301 + 2 - 3 + 4 + 5 - 6 + 7 + 8 - 9 + \cdots + 28 + 29 - 30, where the pattern "plus, plus, minus" continues all the way.