The sixth grade elementary school mathematics volume II oral arithmetic trainer People's Education Edition Page 28 Page 29 Page 30 Answer
Page 28: i.0,05; 3750; 150; 0、2; 1:5000000; 100; 1:500000; 7、5; 1280 ii. 1: 3000000; 1: 150000; I'm too lazy to play after 4500.