A.5 | B.7 | C.8 | D.2 |
A.5 | B.4 | C.9 |
A.294999 | B.309111 | C.295786 |
A.5 | B.0~4 | C.5~9 | D.0~9 |
A.834776 | B.844165 | C.845000 | D.849999 |
A.4~9 | B.1~5 | C.5~9 |
A.个位、十位、百位、千位…是计数单位 |
B.493600省略万后面的尾数约是49 |
C.604000是由6个十万和4个千组成的 |
A.①② | B.②① |
A.2451 | B.3001 | C.2900 | D.2500 |
A.289999 | B.284999 | C.275000 | D.279999 |