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）

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

=4+0.15

=4.15

1999×25+25

=(1999+1)×25

=2000×25

=50000

463-（263-98）

=463-263+98

=200+98

=298

102×25

=(100+2)×25

=100×25+2×25

=2500+50

=2550