Plus 1, minus 1
Ann H. Matzke
Plus 1, minus 1
Age Rating, Reading Level & Content Guide
by Ann H. Matzke
The text is written at a 2nd grade reading level, the subject matter is intended for younger children (ages 5–8), and the content is gentle with no concerning themes.
We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.
About This Book
What if you could make a group bigger or smaller just by adding or taking away one friend? Imagine watching numbers come to life as you see what happens when you add 1 or minus 1. But what surprises will these changes bring?
Themes
Quick Assessment
This early reader book introduces basic math concepts of addition and subtraction using simple text and engaging photos. Designed for children ages 5-8, it helps young learners understand how groups change when one is added or taken away. It is appropriate for early readers and focuses on foundational math skills without any challenging or sensitive content.
Why we rated Plus 1, minus 1 7C
Plus 1, minus 1 is written at a Level 2 reading level across 24 pages. Strong independent readers around grade 3.0 can typically handle this book on their own; with parent or teacher support, Plus 1, minus 1 works for readers up to grade 4.0.
We rate Plus 1, minus 1 as 7C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, Plus 1, minus 1 explores mathematical notation, early math learning, and juvenile literature — these threads give the book room to mean different things to different readers.
Good fit for
- ✓ Children in the Ages 5-8 range — the maturity and attention span match the story's pacing.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Kids drawn to stories about mathematical notation, early math learning, juvenile literature.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
7C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
1/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
Addition and Subtraction
Brad Caudle
Addition and Subtraction
Brad Caudle
Plus, Minus, and Equal (Rookie Read-About Math)
Allan Fowler
Plus, Minus, and Equal (Rookie Read-About Math)
Allan Fowler
Math Plus, 1994
HB Staff
Math Plus, 1994
HB Staff
Addition
Vicky Shiotsu
Addition
Vicky Shiotsu
Adding And Counting on
Richard Leffingwell
Adding And Counting on
Richard Leffingwell
Math Plus, 1994
HB Staff
Math Plus, 1994
HB Staff
Details
Book Length
- ISBN
- 9781615902941
- Pages
- 24
- Publisher
- Rourke Educational Media
- Published
- 2011
- Type
- Fiction