珠心算出题 vs Mental Arithmetic For Learn Usage & Stats

* Generate test expressions freely for mental arithmetic. * Choose Hearing and Seeing Mental Arithmetic * Check the exercise records carefully. * Say the answer carelessly, the first mental arithmetic APP to introduce speech recognition * Adjust the time of mental arithmetic at will. * Edit expressions freely to make learning more symmetrical. * Feel free to share expressions via Wechat or QQ. * Use mental arithmetic to open expression files shared by Wechat or QQ. * Feel free to transfer expressions to computers or other mobile phones. * All kinds of walking functions wait for you to discover.