2026 AMC 8 Problem 1 — Solution & Video | LIVE by Po-Shen Loh

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2026 AMC 8 Problem 1

Attempt Problem 1 of the 2026 AMC 8 below, then check your answer against the video solution and professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2026 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

1.

What is the value of the following expression? $1 + 2 - 3 + 4 + 5 - 6 + {}$ $7 + 8 - 9 + 10 + 11 - 12$

$18$

$21$

$24$

$27$

$30$

Answer: A

Concepts:whole number operations pairing and grouping

Difficulty rating: 370

Video solution:

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Written solution:

Group the expression as $(1+2-3)$ $+(4+5-6)$ $+(7+8-9)$ $+(10+11-12)$ . These group sums are $0,3,6,9$ , respectively, so the total is $0+3+6+9=18$ .

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