Spending hours on a math problem? Sick of crunching numbers all night? No fear! The Ring-Binder Calculator with Ruler is here! This cool calculator is the perfect addition to any science or math 3-ring binder. No one likes to be caught in algebra or physics without this handy little contraption. With this dual-powered solar and battery operated calculator you can not only calculate sums, but you can even take various measurements in U.S. inches. The calculator features an 8 digit display and can do basic operations such as addition, subtraction, multiplication, division, percentages, square roots and more. The calculator is 4.25 inches long, allowing it to be easily slipped into any notebook. Don’t put your student or office worker in a number nightmare--the Ring-Binder Calculator with Ruler is a great birthday gift for the mathematically challenged. Also great for any classroom. Don’t leave home without it!

Box Size: 7.00in (17.78cm) x 4.50in (11.43cm) x 0.40in (1.02cm)

Recommended for ages 7 and older.

Weight: 0 lb 2 oz ( 0.06 kg )