100 * 7.9 + 184 * 2.1 + 84 * 2.9 간편 계산

100 * 7.9 + 184 * 2.1 + 84 * 2.9 간편 계산

100 * 7.9 + 184 * 2.1 + 84 * 2.9 = 100 * 7.9 + (100 + 84) * 2.1 + 84 * 2.9
= 100 * 7.9 + 100 * 2.1 + 84 * 2.1 + 84 * 2.9
= 100 * (7.9 + 2.1) + 84 * (2.1 + 2.9)
= 100 * 10 + 84 * 5
= 1000 + 420
= 1420