带括号的混合运算（2023-08-17）

带括号的混合运算（2023-08-17）：30+(21+38)= 55-(81-59)= 24+(18+52)= 2×(25÷5)= 94-(28-18)= 34+(29+31)= 49+(76-27)= 87-(52+28)= 55-(81-59)= 24+(18+52)= 2×(25÷5)= 94-(28-18)= 34+(29+31)= 77+(37-22)= 75-(66-60)= 42-(52-20)= 97-(44-18)= 72-(29+29)= 87+(73-63)= 95-(97-23)= 68-(89-67)= 77+(37-22)= 75-(66-60)= 42-(52-20)= 3×(28÷4)= 9×(18÷6)= 67-(22+29)= 18+(79-57)= 82+(45-29)= 65-(96-61)= 9×(18÷6)= 67-(22+29)= 18+(79...