24-point quick calculator, math quick calculation trainer, suitable for 3-16 years old, 100 million + question bank, one and two digits within four groups, four arithmetic operations, intelligent question generation, automatic correction, interestingguide to save grades, auxiliary teaching, quick calculation training , exploit thinking, exercise the right brain 24 o'clock develops thinking to exercise the right brain, 24 o'clock games, turns boring exercises into games, and makes children's interests fly. 24 o'clock is called a puzzle, which is widely valued by the education industry and is also the main meansof competition; 24 o'clock The boring practice has become a game, which has a essential effect on quick calculation and thinking ability. Adorable shape baby can't put it down: bear shape, lively and lively, cute and cute, high value, there are two types of pink bear and blue to choose from Built-in addition, subtraction, multiplication and division, posture table audio, compact and portable, and eye protection mode, built-in rechargeable lithium battery, lasting more than 20 hours Difficulty 1: record numbers, find the size, add within 10 Difficulty 2: Addition of one/two digits, subtraction of -digits, continuous addition, finding patterns Difficulty 3: Compound addition and subtraction, multiplication and division in the table, one-digit mixed operations Difficulty 4: Two-digit multiplication, division two-digit mixed operations, 24-point quick calculation Difficulty 5: Four arithmetic applications, 24-point calculation Difficulty 6: Compound four arithmetic, 24-point calculation Delivery Quantity: 1pc Package Contents: Only the above package content, other products are not included. Size: 12.3*7.8*2 cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: pink (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)