(with answers) & urgent

(with answers) & urgent

（30+20%)÷212×3÷(25+20%)30÷(3+40%)27÷8×16×10%(43×20%)+【3×(1÷9)】 14×15%+25×8×(1÷4)19.8÷（1+10%）19.8÷（1－10%）20÷（1-20%）20×（1-25%）20÷（1+20%）20×（1+25%）60÷(30%-25%)120×(1...

Four operations in grade six

The operation of numbers. It's very urgent
A road construction team needs to build a 2100 meter long highway, with an average of 240 meters per day in the first five days. The remaining tasks need to be completed in three days, with an average of how many meters per day?
also:
Car a and car B drive from two cities 600 kilometers apart. Car a travels 65 kilometers per hour. Car B's speed is 11 / 13 of car a's. how many hours later do the two cars meet?

{2100m minus (5 × 240m)} 3 = 300m