Dad gave me 180 yuan, and I bought my own gift and spent it on 80 yuan. The rest of the money is going to buy gifts for five friends, all of which are ordinary. Q: How much do I need to buy gifts for everyone?

( 180-80)÷5

= 100÷5

=20

Extended data:

Integer division:

1, divided by high dividend;

2. How many digits is the divisor? Look at the first few digits of the divisor first. If the divisor is not enough, look at another one.

3, in addition to which one, which one must be written on the business;

4. The remainder of each division must be less than the divisor;

5. After finding the highest bit of the quotient, if there is not enough quotient 1 on the dividend, write 0 on it.

Text expression:

Appendix+Appendix = sum, one addend = sum-another addend.

Minus-Minus = Difference, Minus = Minus-Difference, Minus = Difference+Minus.

Factor × factor = product, one factor = product ÷ another factor.

Dividend = quotient, divisor = dividend = quotient, dividend = quotient × divisor.