7604300读作:
4500000读作:
80050695读作:
900037200读作:
32006094008读作:
3000000009读作:
21
23
41
43
33
53
35
55
1÷0.25= +1 = ×24= + =
400×0.02= 10÷ = 6 ×0= 3× ﹣ ×3=