Hi ABC vs Combinatorics PRO

Click the card to play the English pronunciation, and click the corresponding native language word to play the native language pronunciation. This is an English learning app specially designed for toddlers and beginners. The app aims to provide users with English enlightenment, learn the pronunciation of some common words, and help users memorize words by combining text and pictures. Users can easily learn different kinds of words like Fruits, Vegetables, Farm Animals, Wild Animals, Food, Drinks, Vehicles, Sea Animals, Sports, Colors, Insects, Shapes, Numbers and Alphabets etc. The main function: 1. Word classification: Users can choose different classifications of words to learn according to their own needs. 2. Word pronunciation: Users can click the card to hear the English pronunciation of the word, and can click the native language word to pronounce the native language pronunciation. 3. Picture display: Each word card is equipped with a corresponding picture, which can help users better understand the meaning of the word and deepen memory. 4. Multilingual support: This app supports multiple languages, and users can choose the desired language in the phone's settings for easy learning. 5. Good user experience: the interface design is simple and easy to operate, making users feel comfortable and relaxed in the process of learning English. If you are looking for an excellent English learning app, then this app is for you.

Finally there is the app that provides all 6 variations of combinatorics with step by step solutions: - permutation without repetition: Arranging elements without repetition. - permutation with repetition: Arranging elements with repetition. - combination without repetition: Selecting elements without considering the order. - combination with repetition: Selecting elements with consideration of the order. - variation without repetition: Arranging elements with fixed length without repetition. - variation with repetition: Arranging elements with fixed length with repetition. You only have to enter your values k and n. The values must be entered as natural numbers. The only exception is the k value for permutation with repitition. This requires several k values, which must be entered separated by semicolons. All calculations are stored in the history. The final solution can be shared. [ Contents ] - all 6 variations of combinatorics - results are calculated and shown in detail - history to save the input - detailed solution - natural numbers are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - multiple k values can be entered using the semicolon key - press the check mark button at the bottom right to start the calculation - if values are missing, the corresponding field is highlighted in yellow - if the values are incorrect, the affected field will be highlighted in red - a short message explains why a value is incorrect - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared