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⏳ Add speed, subtract doubt — math mastery starts here!
Humble Math’s 100 Days of Timed Tests offers reproducible, theory-based addition and subtraction drills for kids ages 5-8. This perfect bound workbook features 12 black & white pages sized 8.5 x 11 inches, designed for both classroom and home use. With included answer keys and a proven 4.8-star rating from over 6,200 reviews, it’s a trusted tool to build foundational math skills through daily practice.







| Best Sellers Rank | #171,844 in Books ( See Top 100 in Books ) #106 in Children's Books on Arithmetic #266 in Study & Revision Guides for Children #1,026 in Mathematics (Books) |
| Customer Reviews | 4.8 out of 5 stars 6,252 Reviews |
E**K
Effective for practicing
Effective for practicing, progression of levels is well structured
A**R
Excellent math book
Great for math practice. Variety of questions and difficulty levels. Excellent to use over summer when school is out!
S**M
Single digit problems
I didn't realise it would all be one digit sum rather than double digit.
B**Y
Fantastic math series! - review after 4 years
My son started this math book series 4 years ago, a few months after he turned 5, when he was in kindergarten. He began with this book (Addition & Subtraction) and has been working through the series ever since, about 1-2 pages a day. Now, at age 9, he’s completed 9 books in the series, including topics like fractions, long division, and area and volume. He quickly passed his grade level in math and just kept going! I truly believe these books helped him get into the gifted class. His classmates even call him a “math genius,” and he’s so proud of himself. Now he started learning algebra, while reviewing other topics he has completed. This book doesn’t have much explanation on how to solve each problem, so I do need to teach him sometimes - but he rarely struggles. I think it’s very well designed for introducing new concepts to young kids in a simple and natural way. What I love most is how this daily habit has boosted his confidence and attitude toward learning. Spending just 10-20 minutes a day taught him that small efforts can make a big difference. I highly recommend this series - just encourage your child to do one page a day. It’s a simple routine that brings lasting results, both academically and personally!
O**Y
Math
Good for Math.. used it to train my girl in Math
Trustpilot
3 weeks ago
2 weeks ago