说理:
6×0.9=5.4 6.666×666.9=
6.6×6.9=45.54 6.6666×6666.9=
6.66×66.9=445.554 6.66666×66666.9=
①9.6×9=
②2.5×12.44=
③8.5×1.6=
④※4.51×2.9≈
0.87×0.1=
0.35÷0.7=
0.8×0.5=
5.6÷8=
4.2÷0.2=
2.3×7=
2.4×0.5=
2.3×200=
30÷0.6=
0÷0.09=
3.28÷8=
0.02×7=
= =