2.5×0.4= 4.5÷0.9= 0.28÷7= 1.5×2-2=
0.99÷0.1= 1.09+0.1= 3.5×30= 1.9×99+1.9=
①0.125×7.8×80
②7.2÷1.2+0.8
③12.9÷2.5÷0.4
④30.8-2.16÷0.8
⑤3.9×10.1
⑥7.5×5.5+4.5×7.5
2.33×1.012.33 1.8÷0.991.8
4.7×0.854.7 1.98÷0.51.98×2