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The Rh blood group system was discovered by Karl Landsteiner and Alexander Wiener in 1940. Their research significantly advanced the field of transfusion medicine, enhancing blood transfusion safety and compatibility.
(25)² × 4 ÷ 5 + (3)³ + 48=? + 425
If 28957.5 ÷ 268.125= 108, then 289.575 ÷ 2681.25 is equal to:
(18 × 9 ÷ 6) × 3 = ?
3.55 + 1.05 + 2.5 × 13 – 12% of 12.5 = ?
{(81% of 800 + 28 × 4) – 27 × ?} = 11 × 20
(72× 52+ 1555 )/(79+60) = 2000 ÷ ?
? = (22% of 25% of 60% of 3000) + 21
(3984 ÷ 24) x (5862 ÷ 40) = ?