Addition Grids For each grid you will need to draw 5 vertical lines on your whiteboard like this …. Then draw 5 horizontal lines on your whiteboard like this …. Then copy the numbers on the examples shown. Make sure to look at the top left corner to see what sort of calculation needs to be done. + 2 7 9 8 6 4 Add the horizontal numbers to the vertical numbers, one at a time. Your teacher will show you how on this example. + 2 7 9 8 6 4 Answers + 2 7 9 8 10 15 17 6 8 13 15 4 6 11 13 Questions + 12 7 5 8 16 14 Answers + 12 7 5 8 20 15 13 16 28 23 21 14 26 21 19 Questions + 80 70 150 90 70 50 Answers + 90 70 50 80 170 150 130 70 160 140 120 150 240 220 200