(12 3/4)÷1.4-(-8 1/3)÷(-1.4)+(+10 1/3)÷1.4
=[(12 3/4)-(8 1/3)+(+10 1/3)]÷1.4
=[12-8+10+3/4-1/3+1/3]÷1.4
=(14 3/4)÷1.4
=14÷1.4+3/4÷1.4
=10+3/4÷14/10
=10+3/4×10/14
=10 15/28.
(12 3/4)÷1.4-(-8 1/3)÷(-1.4)+(+10 1/3)÷1.4
=[(12 3/4)-(8 1/3)+(+10 1/3)]÷1.4
=[12-8+10+3/4-1/3+1/3]÷1.4
=(14 3/4)÷1.4
=14÷1.4+3/4÷1.4
=10+3/4÷14/10
=10+3/4×10/14
=10 15/28.