1.8.2× 0. 15 means ().

Two percent of 2.27 is (), and half of 3.6 is ().

3.200.02×25=( )×( )+( )×( )

4. According to 43× 49 = 2 107, 4.3× 4.9 = ().

5.4.5 hours = () hours () minutes; 2.3 hours = () minutes.

Three points, 15 = (), 204 = ()

6.3.234÷2.6=( )÷26 ( )÷0. 15=90÷ 15

7.3.490490 ... Keep one decimal place (), two decimal places () and three decimal places ().

8. Arrange these three numbers 2.078, 2.07878 ... and 2.078078 ... in order of size:

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