问题
解答题
脱式计算(能简算的要简算).
|
答案
解;(1)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4)
=168.8÷42.2
=4
(2)(
-1 3
)×451 5
=
×45-1 3
×451 5
=15-9
=6
(3)105×(
+1 7
+1 5
)1 3
=105×
+105×1 7
+105×1 5 1 3
=15+21+35
=71
(4)0.6×18-
×83 5
=0.6×(18-8)
=0.6×10
=6
(5)
×(5 16
-0.125)3 8
=
×5 16 1 4
=5 64
(6)
×[8 9
-(3 4
-7 16
)]1 4
=
×[8 9
-3 4
+7 16
]1 4
=
×8 9 9 16
=1 2