<span>31/12 + 175/100) : 13 + 25/10 : 15/4 = (775/300 + 525/300) * 1/13 + 25/10 * 4/15 = 1300/300 * 1/13 + 2/3 = 1/3 + 2/3 = 3/3 = 1</span>
1) <span>19 18 17 16 15 14 13 12 11 10
2) 90 91 92 93 94 95 96 97 98 99</span>
1) а-7
23-7=16
57-7=50
60-7=53
95-7=88
2)а+8
23+8=31
57+8=65
60+8=68
95+8=103
1 метр- 100 сантиметров
1 дециметр- 10 сантиметров
100см-10см=90см
Ответ: на 90 сантиметров
270000 руб.
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5-3=2
180000:2=90000
90000*5=450000
720000-450000=270000
270000:3=90000