问题
解答题
计算下列各题 (1)
(2)(-24)×(
(3)3.14×6.49+3.14×(-5.49)-9×(-3.14) (4)(-1
|
答案
(1)
÷5 6
-2 3
×(-9)2+32,1 3
=
×5 6
-3 2
×81+9,1 3
=
-27+9,5 4
=-
;67 4
(2)(-24)×(
-1 12
+1 6
),3 8
=
×(-24)-1 12
×(-24)+1 6
×(-24),3 8
=-2+4-9,
=-11+4,
=-7;
(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)
=3.14×(6.49-5.49+9),
=3.14×10,
=31.4;
(4)(-1
)2-(-1 2
+2 3
)÷(-1 2
)3,1 6
=
-(-9 4
)×(-216),1 6
=
-36,9 4
=-
.135 4