Our youngest son had a "fill in the missing numbers in the number grid" math assignment. I thought it would be a snap for him, but as he sometimes transposes numbers, it became a source of major frustration. Oy!
To familiarize him a little more with number grids and some of the quick addition and subtraction you can do with them, I made a few activities. These were inspired by Playdough to Plato's peek-a-boo chart and Mrs. T's First Grade Class number puzzles.
You can download this 100 number grid activity for free from Google Drive here. It's a 3-page PDF.
NOTE: If you are a teacher, use your personal gmail account if it requires you to request permission. Most school districts restrict emails from outside their domain, and therefore I can't grant access and let you know it's available.
Activity #1: 10 more, 10 less, 1 more, 1 less
I printed the number grid on white card stock. I printed page two of the free printable PDF on colored card stock. I cut the center plus-sign out. Then I added white gift wrap tissue squares to the plus signs "arms" making those squares translucent (vellum would work well too), and left the center empty. For the sake of durability, I ran this sheet through my laminator.
With the 10 more, 10 less, 1 more, 1 less page laminated, I wrote some simple math problems on it in the blank area (e.g. 13+10= , 47-10=, 91+1=, 74+1=) with a dry-erase marker. My son placed the laminated page over the number grid so the first number in the equation was in the center. Then he could easily see in the translucent squares which was his answer (i.e. 10 less was directly above, 10 more directly below, 1 more to the right, and 1 less to the left). This made solving the math problems easy!
Activity #2: Number Grid Puzzles
Now I printed the number grid on colored card stock and printed an empty grid on white card stock. I cut the colored grid apart into a variety of puzzles that were about 10-11 squares each.
Once done, I cut the number squares apart and handed him a few piles of puzzles. He arranged them wherever on the blank grid, remembering 10 less is above, 10 more is below, 1 more is on the right, 1 less is on the left. When he completed this puzzle, he moved on to the next. You can make approximately 7-8 puzzles per grid.
