[tex]1)a = (6 \div 6 + 8 \times 1) \times 4[/tex]
[tex]a = (1 + 8) \times 4[/tex]
[tex]a = 9 + 4[/tex]
[tex]a = 13[/tex]
[tex]b = 37 + 45 \div (3 \times 3 - 28 \div 7)[/tex]
[tex]b = 37 + 45 \div (9 - 4)[/tex]
[tex]b = 37 + 45 \div 5[/tex]
[tex]b = 37 + 9[/tex]
[tex]b = 46[/tex]
[tex]c = (56 \div 8 - 3) \times (50 - 6 \times 7)[/tex]
[tex]c = (7 - 3) \times (50 - 42)[/tex]
[tex]c = 4 \times 8[/tex]
[tex]c = 32[/tex]
[tex]a + b + c = 13 + 46 + 32 = 91[/tex]
