---
product_id: 166649755
title: "Humble Math - 100 Days of Timed Tests: Addition and Subtraction: Ages 5-8, Math Drills, Digits 0-20, Reproducible Practice Problems"
price: "₨6237"
currency: LKR
in_stock: true
reviews_count: 5
url: https://www.desertcart.lk/products/166649755-humble-math-100-days-of-timed-tests-addition-and-subtraction
store_origin: LK
region: Sri Lanka
---

# 8.5 x 11 inch perfect bound 100 days of timed drills Addition & subtraction focus Humble Math - 100 Days of Timed Tests: Addition and Subtraction: Ages 5-8, Math Drills, Digits 0-20, Reproducible Practice Problems

**Price:** ₨6237
**Availability:** ✅ In Stock

## Summary

> 📚 Level up your math game—because every second counts!

## Quick Answers

- **What is this?** Humble Math - 100 Days of Timed Tests: Addition and Subtraction: Ages 5-8, Math Drills, Digits 0-20, Reproducible Practice Problems
- **How much does it cost?** ₨6237 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/166649755-humble-math-100-days-of-timed-tests-addition-and-subtraction)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Instant Feedback Loop:** Answer key included for self-checking and independent improvement
- • **Durable & User-Friendly:** Perfect bound, glossy laminated pages built to withstand daily use
- • **Flexible Learning Style:** Use as timed drills or relaxed practice to fit any learning pace
- • **Master Math Fluency Fast:** 100 days of progressive, timed tests to boost speed and confidence
- • **Comprehensive Skill Coverage:** Covers digits 0-20 with a clear, structured difficulty curve

## Overview

Humble Math - 100 Days of Timed Tests is a meticulously designed workbook for ages 5-8, featuring 100 reproducible addition and subtraction practice pages focused on digits 0-20. With a structured progression from simple to complex problems, it supports both timed drills and relaxed practice. The workbook is perfect bound with glossy laminated pages for durability, includes an answer key for self-assessment, and is highly rated by thousands of parents and educators for effective skill-building.

## Description

This workbook has 100 days of reproducible addition and subtraction practice problems for digits 0-20. Use these pages as timed tests to improve fluidity or let students complete them at their leisure. Answer key is located at the back of the book. Workbook Contents: Adding Digits 0-5 ........................ pages 1-8 Adding Digits 0-7 ....................... pages 9-16 Adding Digits 0-10 ...................... pages 17-40 Subtracting Digits 0-10 ............... pages 41-48 Subtracting Digits 10-20 ............ pages 49-60 Subtracting Digits 0-20 .............. pages 61-80 Adding and Subtracting ............... pages 81-100 (Answer Key in Back)

Review: Effective for practicing - Effective for practicing, progression of levels is well structured
Review: Excellent math book - Great for math practice. Variety of questions and difficulty levels. Excellent to use over summer when school is out!

## Features

- 12:B & W 8.5 x 11 in or 280 x 216 mm Perfect Bound on White w/Gloss Lam

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #45,626 in Books ( See Top 100 in Books ) #26 in Children's Books on Arithmetic #71 in Study & Revision Guides for Children #278 in Mathematics (Books) |
| Customer Reviews | 4.8 out of 5 stars 6,304 Reviews |

## Images

![Humble Math - 100 Days of Timed Tests: Addition and Subtraction: Ages 5-8, Math Drills, Digits 0-20, Reproducible Practice Problems - Image 1](https://m.media-amazon.com/images/I/61zsyCx4y-L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Effective for practicing
*by E***K on 26 September 2023*

Effective for practicing, progression of levels is well structured

### ⭐⭐⭐⭐⭐ Excellent math book
*by A***R on 22 September 2025*

Great for math practice. Variety of questions and difficulty levels. Excellent to use over summer when school is out!

### ⭐⭐⭐⭐ Single digit problems
*by S***M on 13 August 2025*

I didn't realise it would all be one digit sum rather than double digit.

## Frequently Bought Together

- Humble Math - 100 Days of Timed Tests: Addition and Subtraction: Grades K-2, Math Drills, Digits 0-20, Reproducible Practice Problems
- Humble Math - 100 Days of Timed Tests: Multiplication: Grades 3-5, Math Drills, Digits 0-12, Reproducible Practice Problems
- Humble Math - 100 Days of Timed Tests: Division: Grades 3-5, Math Drills, Digits 0-12, Reproducible Practice Problems

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-08-12*