210500≈万 78987≈万 93564≈万
6.86.800 4.353.45 0.900.09 2650g2.6kg
①1.3×0.65=
②50-12.85=
③7.83+34.7=
④7.08×3.5=
⑤800×0.045=
⑥16.2-7.08=
①70+124÷4×20
②500-80÷8×32
③6400÷[(92-88)×16]