①70-29.6-10.4
②283×5+17×5
③73+3.4+27+5.6
④10-2.75-3.25
⑤85×99
⑥25×64×125
①﹣+-
②(﹣)×18×12
③2×1.5+4.5÷0.75
④69×9.9+6.9