问题
解答题
计算: (1)(-18)÷2
(2)4+3×(-2)3+33; (3)30÷(
|
答案
(1)(-18)÷2
×1 4
÷(-16)4 9
=18×
×4 9
×4 9 1 16
=
.2 9
(2)4+3×(-2)3+33
=4+3×(-8)+27
=-20+27
=7.
(3)30÷(
-1 5
)1 6
=30÷1 30
=900.
计算: (1)(-18)÷2
(2)4+3×(-2)3+33; (3)30÷(
|
(1)(-18)÷2
×1 4
÷(-16)4 9
=18×
×4 9
×4 9 1 16
=
.2 9
(2)4+3×(-2)3+33
=4+3×(-8)+27
=-20+27
=7.
(3)30÷(
-1 5
)1 6
=30÷1 30
=900.