①25×32×125
②15.35﹣(5.35+7.2)
③240÷[(24+72)÷6]
④6.3+6.44+2.7+3.56
1364×83+1364×18-1364
999×222+333×334
11111×99999
9999×9999+19999
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)