а) (24+18):7-0•(82-58)+16•3=
б)21:(96-89)+(7•4+6)•2-56:56=

#1

[tex](24 + 18) - 0 \times (82 - 58) + 16 \times 3 = 42 \div 7 - 0 + 48 = 6 + 48 = 54[/tex]

#2

[tex]21 \div (96 - 89) + (7 \times 4 + 6) \times 2 - 56 \div 56 = 21 \div 7 + (28 + 6) \times 2 - 1 = 3 + 34 \times 2 - 1 = 3 + 68 - 1 = 70[/tex]