10. 463 700 : 50 + 546 · 40
55 440 : 90 – 10 460 : 20
41 090 : 70 + 11 950 : 50
8 130 : 30 - 2640: 10
900 100 - (735 - 184). 80
60 997 + (6 012 + 6 228): 30
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2. 1) 55440:90=616 2) 10460:20=523 3) 616-523=93
3. 1) 41090:70=587 2) 11950:50=239 3) 587+239=826
4. 1) 8130:30=271 2) 2640:10=264 3) 271-264=7