These thematic pictures of ریاضی are analogous to a visual dictionary. The theme "ریاضی " is split into several parts. For children, especially toddlers from 1 to 5 years old, it is better to divide the sets of cards over several days, or even weeks, so that the information is absorbed better. This is especially true if you are using flashcards to learn urdu language that is not your native language.
To expand your urdu language vocabulary on the "ریاضی " topic, flashcards games are the best way:
make memory with "ریاضی "
assemble puzzle with ریاضی
make a memory chain or group images by color, size or other attributes