х:8=800×10
х×8=800×10
700:х=7×100

х:8=800×10. х×8=800×10х:8=8000. х×8=80008000×8. 8000:8х=64000 х=1000___________ ______________64000:8=800×10. 1000×8=800×10700:х=7×100700:х=700700:700х=1_____________700:1=7×100