速算练习 app for iPhone and iPad
Quick Calculate
Gather speed calculation techniques commonly used to produce the corresponding topics
students can practice and see help for quick calculation process.
For example:
Head same, tail complement,Formulas: the head by head, tail plus tail, tail by tail.
Complement first , same digital another,Formulas: a first add 1 to the head by head, tail by tail.
QuickCalculate:
1 Select the type of exercise
2 Go to practice, enter the answer, or watching quick calculation process and help.
3.support comprehension practise.