问题
解答题
计算 (1)(-0.62)-(-3
(2)(-
(3)-14+2×(-3)2-5÷
|
答案
(1)原式=-0.62+3
+2.62-2 5
=2+23 5
=44 5
;4 5
(2)原式=-24×(-
)-24×3 4
-24×(-7 12
)=18-14+15=19;5 8
(3)原式=-1+2×9-5×2×2=-1+18-20=-3.
计算 (1)(-0.62)-(-3
(2)(-
(3)-14+2×(-3)2-5÷
|
(1)原式=-0.62+3
+2.62-2 5
=2+23 5
=44 5
;4 5
(2)原式=-24×(-
)-24×3 4
-24×(-7 12
)=18-14+15=19;5 8
(3)原式=-1+2×9-5×2×2=-1+18-20=-3.