Number pyramids - addition and substraction: 150 Addition Pyramid Challenges - addition and subtraction practice workbook - Pyramid Arithmetic Additio (Paperback) (ISBN-13: 9798721597787)

If you want to Improve your child's success in class with lots of addition and subtraction practice Take this pyramid math puzzle challenge and let him figure out the missing numbers in each of the 150 pyramids

25 pyramids with three levels

25 pyramids with four levels

50 pyramids with six levels

50 pyramids with seven levels

The principle is simple, you have to add two adjacent boxes (side by side) and the sum will correspond to the box above.

♥ 150 pyramids

♥ Dimensions: 8.5 x 0.17 x 11 inches

♥ Paperback: 73 pages