a,(2400+72):24=(2400:24)+(72:24)=100+3=103
b,(3600-180):36=(3600:36)-(180:36)=100-5=95
c,(525-315):15=(525:15)-(315:15)=35-21=14
d,(1026-741):57=(1026:57)-(741:57)=18-13=5
e,100:24-52:24=(100-52):24=48:24=2
f,18:9+32:9+40:9=(18+32+40):9=90:9=10
g,23:8+35:8-10:8=(23+35-10):8=48:8=6
h,94:11-15:11+20:11=(94-15+20):11=99:11=9
i,37.138-38.37=37.(138-38)=37.100=3700
k,(77.45.24):(8.9.11)=(77:11).(45:9).(24:8)=7.5.3=105
l,(25+3.75-250):(2014.2015.2016+2017.2018.2019)=(25+225-250)(2014.2015.2016+2017.2018.2019)=0:(2014.2015.2016+2017.2018.2019)=0
m,(25.3636-2525.36):(2011.2012.2013....2020)=(90900-90900):(2011.2012.2013...2020)=0