PDF 1st grade math packet - lcboe.net You may need to use math manipulatives to help with this. Missing Numbers Write in the missing numbers. This chart is to practice reciting numbers 1-120. Build the Shape Use toothpicks, marshmallows, and pipecleaners to form the shapes. Halves Divide the shapes in halves. Talk about the names of each shape. 2D and 3D shapes