6米8分米= 米 56厘米=米
6.286.28÷10 5.44+4.5610.2
8.88.8×2.5 8.6×00+8.6
2.6+1.7= 4-2.8= 4.83+1.17= 2.7×5×0.2=
3.6÷100= 2.5×40= 2.3×0.4= 1.4×2.7×0=
①10-5.48=
②0.75×0.6=
③15.9+21.84=
④9.64×2.2=