能简算的要简算0.175÷0.25÷4（3.2+0.12）÷0.81999×25+25463-（263-98）102×25

Question

能简算的要简算 0.175÷0.25÷4 （3.2+0.12）÷0.8 1999×25+25 463-（263-98） 102×25

Answer 1

0.175÷0.25÷4
=0.175÷(0.25×4)
=0.175÷1
=0.175
(3.2+0.12)÷0.8
=3.2÷0.8+0.12÷0.8
=32÷8+1.2÷8
=4+0.15
=4.15
1999×25+25
=(1999+1)×25
=2000×25
=50000
463-(263-98)
=463-263+98
=400+98
=498
102×25
=(100+2)×25
=100×25+2×25
=2500+50
=2550