Correct
心算
/ xīnsuàn /
Strokes
Definition
mental arithmetic/to calculate in one's head/planning/preparation
Example
As a Verb
do mental arithmetic; do sums mentally
1
Xīnsuàn
心算
nénglì
能力
ability of mental arithmetic
2
Xīn
心
suàn
算
gāoshǒu
高手
lightning calculator
3
Jìnxíng
进行
kuàisù
快速
xīnsuàn
心算
do a rapid mental calculation
4
Shànyú
善于
xīnsuàn
心算
be good at mental arithmetic