先化简,再计算
1+(-9)= 8+(+20)= 78-8+(-92)÷77= 87-9+9=
1+1-9+8=
去括号
-(1-9+8-6-3)= -[-(88-99+66+59-77-100)]=
82-99-5+6-(-6)= 1087-(8)-9+72-(95+885)=
计算
2 3 3 1
(-8)-4 = 72-56+(-5) = 52-(——)×104+99=
52
1 2 100
53 -(-6)= 54+(-0) =
1 1
99÷5+99-63×——= 88÷(——)×3×4-22+6=
2 4
2 3
8×(-7)÷4÷7-6+8= 7×7-(-1)÷4+8=
1 1 1
[73+(56)]÷3= ( 82)+(43)÷2×5=
(88-73)×62-(-80)= 100-(-8)+8-(8)= 100÷(-100)×9=
44÷4×3-4-4+(-55)= 77÷11-(-3)×5=
81÷3×2-1+258= 51×2+8-(-1)+89= 共26个