A great activity that can be played many ways.
Teacher or a child writes out the addition or subtraction sums that equal the number on the Lotto board. Teacher calls out different sums and as children work out each sum they place a counter on the answer if they have it on their board. The first one to have board covered calls out BINGO and they win.
Another way it can be used as MAGIC NUMBERS. Children work out three different ways they can get to the answer on the board. For example if i have 12 on my bingo board (6+6 =12, 24 - 12 = 12 and 24/2 = 12, 3+3+3+3 = 12). They then move on to the next number on the board.
Print and laminate them as game boards or print them for worksheets.