A school library had 1900 books. It bought 700 more and gave away 1000. How many books does it have now?
A bank account has 27 000 baht. 6850 baht is paid in, then 8950 baht is taken out. How much is in the account now? True or false? You add, then subtract.
A family earns 48 000 baht a month. They spend 11 100 baht on food, 14 500 baht on rent and 4850 baht on bills. They save the rest. How much do they save?