835-169-31
743-(235+143)
824-224-176-124
671-24-16-60
①34×125×8
②99×75
③8100÷45÷9
④11×123+11×22-33×15
⑤37×[278-(53+35)]
⑥3.07-1.57+6.93-3.43
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
④
⑤
⑥