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The bridge year, one rung at a time.
Pre-algebra is where arithmetic becomes algebra, and this book climbs that bridge in
order: negative numbers first, then expressions, then one-step and two-step equations,
then percents - a ladder of 89 short practice sets where every rung is a small step up
from the one below it, with a placement check at the front so nobody starts in the
wrong place.
No wall of problems. Every page is a handful of small lettered blocks worth
100 points together, with a bonus for finishing each one. One block is a sitting. A
page is a session.
An answer key you can trust, by construction. Every one of the 2,760 answers
was computed together with its problem and independently re-checked by a separate
program before printing. The key and the questions agree by construction - not by
proofreading.
Inside: