1) 72507+56736=129 243
350-347=3
129243÷3=43 081
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2)560000:100=5600
5600×8=44800
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3)4833042:6=805 507
805 507×8=6 444 056
6444056-8044=6 436 012
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4) 932+17692=18 624
18 624×4=74 496
74 496:6=12 416
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3×100=300
600-300=300
500+300=800
800÷10=80