TI-10 Basic Calculator. 2-line calculator with great pedagogical features, designed for the youngest students. Appropriate for: Math grades K-5 and general math. Easily enter problems with large number and operation keys. Allows students to develop computational skills using operations and changing the level of difficulty while keeping score of the right and wrong answers. See how many 1s, 10s, 100s, 1000s, or even 10ths and 100ths are in a specified number.