James aka Chunk

3x2x7=42
(42+1)x10=430
430+5=435

75x9=675
675+100=775
50/5=10
775+10=785

(75+25)+(5-3)=102

(8+4)x25=300
100/50=2
300+75+2=377

7x7=49
100+(49-2)=147

100x10=1,000
8/(50/25)=4
1,000-4=996

(100+10)x(4+1+1)=660
660+8=668

(100-(50/25))x9=882
882-(75-5)=812

Not quite in time

(25+75)x9=900
4x3=12
900-12=888

(9-4)x100=500
500-7=493

(100/50)x3=6
(75+6)x8=648

(10+9)x(100/50)=38
38x8=304

(75+5+7)=87
87x10=870
870+2+7=879

8x(4+5)=72
(72+2)x10=740

(100+8)x(10/10)=108

Just because.

(9+3)x75=900
900-4=896

(8x7)+(3x2)=62
62x10=620
620-4=616

75+8+8=91
91x3=273

Just to be long winded and use all the numbers:

25+75=100
9-8=1
8-6=2
(100x2)x1=200

(7+8)x2=30
30x25=750
3/3=1
750+1=751

75x3=225
(50/25)+6=8
225+8=233

100x8=800
(6/3)x4=8
800-8-9=783

75x(2x6)=900
900-8=892

(100-4)x9=864
864-7=857

My first thought was to go with 96x9. A 1.5 for me

7x7=49
(9/9)+6=7
49x7=343
343+3=346

Saw it just too late to get it in time

75-9-3=63
63x10=630
630-(9-2)=623

25x4=100
100+75+9=184

(9+3)x50=600
8/(10/5)=4
600+4=604

(7-2)x5=25
100+25=125

(8x2)x50=800
800-4-6=790