28×26=26×
25×29×4= ××29
200×8×=200×15×8
25×(9×4)=(25×)×
5.195.91 7.497.5
8米6分米8.02米 3.2吨 3200千克
3.4+0.7=
0.13×2=
7.6-4.5=
0.04×0.8=
6.8-6.08=
91÷100=
(17+11)÷2=
5y-3.6y=
9:=%= =:120=(填小数)