Решение:
\(39:3 - 4 = 13 - 4 = 9\)
\(64:2 - 3 = 32 - 3 = 29\)
\(48:4 - 8 = 12 - 8 = 4\)
\(100 - 3 \times 4 = 100 - 12 = 88\)
\(6 \times 9 + 48:6 = 54 + 8 = 62\)
\(66:3 \times 2 - 5 = 22 \times 2 - 5 = 44 - 5 = 39\)
\(84 - (48 + 26) = 84 - 74 = 10\)
\(23 + (75 - 48) = 23 + 27 = 50\)
\(53 - (53 - 40) = 53 - 13 = 40\)