

Once There Were Twelve
Aquí había doce
Once There Were Twelve
Once There Were Twelve
Once There Were Twelve
Once There Were Twelve
Once There Were Twelve
Concept (fiction), 213 words, Level H (Grade 1), Lexile 280L Grade 1
In the book Once There Were Twelve readers can practice solving subtraction word problems with visual support. To answer the question "How many are missing?" readers will have to count the number of items remaining from each group of twelve. By exploring the decomposition of the number twelve, students will practice finding the missing or unknown number in a subtraction problem.