간편 계산 (5.2 - 4.6) X4.6 - 0.9

간편 계산 (5.2 - 4.6) X4.6 - 0.9

(5.2 - 4.6) X4.6 - 0.9 = 0.6x4.6 - 0.9 = 0.6x4.6 - 0.6 - 0.3 = 0.6X (4.6 - 1 - 0.5) = 0.6X3.1 = 0.6X (3 + 0.1) = 0.6X3 + 0.10.6 = 1.86