65~67 pages of oral calculation and quick calculation exercises every day:

2.8×0.4= 1. 12

14-7.4=6.6,

1.92÷0.04=48,

0.32×500= 160,

0.65+4.35= 5

10-5.4=4.6,

4÷20=0.2,

3.5×200=700,

1.5-0.06= 1.44

0.75÷ 15=0.05,

0.4×0.8=0.32,

4×0.25= 1,

0.36+ 1.54=2

1.0 1×99=99.99,

420÷35= 12,

25× 12=300,

135÷0.5=270