6: 336÷3.2--336÷4.8
=105--70
=35
7: 错题
8: 1000÷﹙81÷100﹚
=1000÷0.81
≈1235
9: 93×0.55+26×0.35
=51.15+9.1
=60.25
10: ⑴ 600÷3=200
﹙600--200×1.2﹚÷1.2
=﹙600-240﹚÷1.2
= 360÷1.2
=300
小张 300÷2=150
小李 150+200=350
⑵ 600÷350≈1.7