This workbook is rather comprehensive and based on Singapore Primary 2 / Grade 2 Math Syllabus. It is the easiest level. There is a link to the online exercises that you can use in class if you have a computer and whiteboard in the class. Your students can do the same exercises online. If they choose to use the Learning Paths, they need to achieve at least 80% accuracy to move on to the next exercise. To go to the online exercises directly without using the learning paths, click on each of the exercises on Table of Contents page. The pages are linked to the pages inside the pdf.
Topics covered for Numbers up to 1000
Counting Objects, Read and write numbers, Place Value, Compare numbers, Ordering Sequential numbers, Addition and Subtraction with and without renaming, Multiplication and Division with tables 2, 3, 4, 5 and 10 and Word Problems.