(RM) take out the stored value?

(M-) Subtract the current displayed value from the stored value and save it?

(M+) Put the currently displayed value into the memory and interrupt the digital input?

The (0-9) buttons are 0-9 character keys for inputting numbers.

(。 ) button is used to input decimal point?

The (+/-) button is used to convert the positive and negative of the current value?

(√) Find the square root

(%) Find the percentage?

(→) Provide backspace function?

(c) Press the button to clear the input just now.

(=) Confirm the calculation result?

Return to zero (AC) clears all data results and operators?

(CE) Clears the value in the existing register and displays "0". Re-enter data.

Extended data:

It is best not to use calculators in primary schools.

The cultivation of mathematical operation ability begins from a very young age.

Using a calculator too early will kill the bud of children's computing ability and even fast computing ability. Calculators are used to solve problems that are difficult to calculate by hand or take a lot of money and time to work out. There is no calculator in the entrance examination. I think this is also good for students.

If you have formed a dependence on calculators since primary school, even if your thinking logic ability is strong, I believe you will not do well in mathematics in the future, because operation is a bridge between process and result.