问题
解答题
计算: (1)-2.5÷
(3)(-
(5)-5÷(-1
|
答案
(1)-2.5÷
×(-5 8
)=1 4
×5 2
×8 5
=1;1 4
(2)-27÷2
×1 4
÷(-24)=27×4 9
×4 9
×4 9
=1 24
;2 9
(3)(-
)×(-33 5
)÷(-11 2
)÷3×(-31 4
)÷(-11 2
)÷3=-1 4
×3 5
×7 2
×4 5
=-1 3
;14 25
(4)-4×
÷(-1 2
)×2=2×2×2=8;1 2
(5)-5÷(-1
)×2 7
×(-24 5
)÷7=-5×1 4
×7 9
×4 5
×9 4
=-1;1 7
(6)|-1
|÷1 8
×3 4
×|-4 3
|=1 2
×9 8
×4 3
×4 3
=1.1 2