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«Mathematics 1 class 2 part» — — is a workbook that helps to learn arithmetic operations, learn how to add and subtract within 100, and understand how to find the unknown component of an example. More than 30 training activities and 146 colourful tasks for working with numbers. To make the lessons interesting, mark each completed task with a bird sticker to make them more effective - write down the date you complete the task and how long it took you to complete it.