(1)4.6-2.5-(-11.2)
= 4.6-2.5+11.2
= 2.1+11.2
= 13.3
(2)原式=-6分之5+28.7-6分之1
=28.7-1
=27.7
(3)原式=-3分之4-2
=-2又
3分之4
(4)原式=15分之10-15分之9+3
=15分之1+3
=3又15分之1
(5)原式=-7分之5+7分之3+3
=-7分之2+3
=2又7分之5
(6)原式=11又2分之1+4又2分之1-1又4分之3-1又4分之1
=16-3
=13
(7)原式=4+0.5+8 -6
=12.5-6
=6.5
(8)原式=2分之1+4分之1-3分之1-3分之2
=4分之3-1
=-0.25