<span>(12*5+20) : 4 =20</span>
<span><span>12* (5+20) : 4 =75</span></span>
<span><span><span>12 * (5+20 : 4) =120 </span></span></span>
<span><span><span><span>10000 : (200-20*5) =100</span></span></span></span>
<span><span><span><span><span>(10000 : 200-20) * 5 =150</span></span></span></span></span>
<span><span><span><span><span><span>10000 : (200-100) * 5 =500</span></span></span></span></span></span>
-х=31 17/37-45
х=3 20/37
х=1 17/31-18/31+29/31
х=1 28/31
4 осталось, значит
46-4=42
число уменьшилось на 42
-1000000-65000=−1065000
−1065000-2000=−1067000
−1067000-3000=−1070000
−1070000-50000=−1120000
5м это 50 дм
т. е. 50дм-2дм=48дм