r) 273:39°7
9-7=2
135:15=9
9×4=36
144:18=18
36-18=18
18×2=36
4×7 =28
36-28 =8
s) 105:3=35
210:7=30
8×5=40
56:7=8
7×5=35
8+35=43
7×44=308
4×43=172
308 -172=136
136:4=34
34+80=114
t)75:25=3
3+3=6
264-6=258
258×40=10320
250:5=50
15:3=5
50+5=55
55×10320=567.600
567.600×5=2.838.000
2838.000-400 =2.837.600
1500+2837600=2839100
2848100×2=5678200
