[มอมแมม]

ข้อ 3 Y M C
Y = 1
M = 4
C = 8
Y M C
Y M C +
Y M C
M M M
1 4 8
1 4 8 +
1 4 8
4 4 4
Y × M × C = 1 × 4 × 8 = 32
Y + M + C = 1 + 4 + 8 = 13
(Y × M × C) - (Y + M + C) = 32 - 13 = 19