12 * 10 = 120 м²
120 : (29 + 1) = 120 : 30 = 4м²
<u>Ответ: 4м².</u>
240:60•100000+60000-1=400000+60000-1=460000-1=459999
<span><span>1)</span>12*2-9*2-0*2+7*2=24-18-0+14=20
</span><span><span>2)</span><span>12*300-9*300-0*300+7*300=3600-2700-0+2100=3000
3)12*1000-9*1000-0*1000+7*1000=12000-9000-0+7000=10000</span></span>
(8412:4)·(75·50)=2103·3750=7886250
(48+52):(50:5)=100:10=10
(71·63)·(17·3)=4473·51=228123
(53·7)·(815-793)=371·22=8162