60×【12分之5+15分之1-2分之1】
=60×(25/60 + 4/60 - 30/60)
=60×(-1/60)
=-1
【5分之4-2分之1×5分之4】÷3分之2
=(4/5 - 2/5)÷2/3
=2/5 ÷2/3
=2/5 × 3/2
=3/5
=0.6
24×43分之51+43分之49×51
=(24+49)×51/43
=73 ×51/43
=86又25/43
【15分之8+20分之9×3分之2】÷12分之1
=（8/15 + 3/10 ）÷1/12
=5/6 ÷1/12
=5/6 × 12/1
=10
【4分之7-4分之3÷4分之3】×4
=（7/4 - 1）×4
=3/4 ×4
=3
5.3×5分之3-1.3×60%
=15.9/5 - 0.78
=3.18-0.78
=2.4
12分之5÷2分之1+3分之1 ÷5分之2
=5/12 ×2/1 + 1/3 × 5/2
=5/6 +5/6
=1又2/3
2.65×1.7+1.35×1【10分之7】
=4.505 + 0.945
=13.955
【6分之5×10.68+7.32×6分之5】÷8分之5
=（8.9 + 6.1）÷0.625
=15÷0.625
=24
7分之4÷7分之5+7分之3×9分之7
=4/5 +1/3
=12/15 + 5/15
=1又2/15
18分之5×【【4分之1+5分之1】÷4分之3】
=5/18×[(5/20 + 4/20) ÷ 3/4 ]
=5/18×[9/20 × 4/3]
=5/18 ×3/5
=1/6
20分之9÷{2分之1×【3分之2+5分之4】}
=9/20 ÷[1/2 ×8/15]
=9/20 ÷4/15
=9/20 ×15/4
=1又11/16
8分之11÷{【4分之1+5分之1】÷4分之3】
=11/8 ÷ [(5/20 +4/20)÷3/4]
=11/8 ÷[9/20 ×4/3]
=11/8 ÷3/5
=11/8 ×5/3
=55/24
=2又7/24
【12分之7-8分之3】×24-9分之5
=（28/48 - 18/48）×24 - 5/9
=5 -5/9
=40/9
=4又4/9
6.4×【1-8分之3】-1.5
=6.4 ×5/8 -1.5
=4-1.5
=2.5