Vertical types are as follows:

Calculated by integer;

5*3= 15 Write 5 as1; 4*5=20 plus 1? Write 1 as 2;

Repeat the above steps, and finally add the results.

Extended data:

Vertical operation properties:

The multiplicand is expanded (reduced) by n times, and the product is correspondingly expanded (reduced) by n times when the multiplier is unchanged.

The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times.

Dividing by two divisors in succession is equal to dividing by the product of these two divisors. Sometimes simple operations can be performed according to the nature of the division. For example, 300÷25÷4=300÷(25×4) divided by a number is equal to the reciprocal of this number.

According to the multiplication table, two integers can be calculated by long division (direct division). If the dividend has a decimal part (or decimal point), just bring the decimal point down when calculating; If the divisor has a decimal point, move the decimal points of the divisor and the dividend at the same time until the divisor has no decimal point.