Краткое пояснение: Выполним указанные действия.
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13 806 : 531 = 26
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30 240 : 420 = 72
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7 009 ⋅ 24 = 168 216
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5 060 ⋅ 73 = 369 380
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1 000 – 100 : 5 ⋅ (2 + 8) = 1 000 – 100 : 5 ⋅ 10 = 1 000 – 20 ⋅ 10 = 1 000 – 200 = 800
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1 000 – (100 : 5 ⋅ 2 + 8) = 1 000 – (20 ⋅ 2 + 8) = 1 000 – (40 + 8) = 1 000 – 48 = 952
Ответ: 26; 72; 168 216; 369 380; 800; 952