Learn to determine unknown whole number in addition and subtraction equations using bar models/tape diagrams. (For Distance Learning)Using the model method, young learners are able to visualize the concept. It sets a strong foundation for young learners before they progress to problem solving.This pack of resources help students to understand:- Why subtraction is applied when solving an unknown addend problem. (For example 7+ ___=10)- How to determine unknown whole number on the left side of an