我每小时清理垃圾kg
×8-
⑴×48=
⑵-0.25=
⑶÷6=
⑷42÷60%=
⑸=
⑹2×=
×2.8 =
0.75+ =
=
0.25×23×4=
99×+× 99=
14.7-4.07=
4×÷4×=