Multiple learning modes: This children&#39;s mouth calculator has a variety of learning modes, such as regular mode, wrong question mode, game mode, one digit addition and subtraction, two digit addition and subtraction, multiplication and division, formula mode, etc. Children can not only exercise their mathematical operation ability in games, but also improve their memory.<br /> <br /> Play&amp;learn in one: There are 3 games in the game mode. Short press can switch between different games, namely: record numbers/search size/search rules. These three games allow children to experience the fun of games while learning mathematics. The perfect combination of games and learning. It can not only stimulate children&#39;s interest, but also improve their arithmetic ability in a relaxed and pleasant way, making them fall in love with mathematics. Great gift for children.<br /> <br /> &nbsp;Math Skills Development: This child mouth calculator is a very smart &quot;&quot;little teacher&quot;&quot;. It can exercise children&#39;s mathematical skills in games, and is very suitable for teaching children to remember numbers, search size, search mode, addition, subtraction, multiplication and division. Give students an interesting new way to explore the meaning and value of numbers. Let children develop the good habit of independent learning, greatly improving the effectiveness of learning.<br /> <br /> Interesting learning: This children&#39;s mental arithmetic training machine is mainly used for the early teaching of mental arithmetic for children aged 4 and above. Children can experience the mystery of numbers while playing. Oral calculators can exercise the ability of addition and subtraction, multiplication and division in mathematics, promote children&#39;s intellectual development and improve their mathematical operation ability. Let children say goodbye to the boring way of learning.<br /> <br /> Advanced design: Timer switch button, short press can freely set the answer time of each question, respectively 5 seconds and 10 seconds. Children need to answer questions within the specified time. After entering the answer, the machine will automatically judge whether it is right or wrong. Press and hold the timer switch button to turn the sound effect of answering questions off/on.