问题
解答题
|
答案
(1)61
-15.37+383 4
-34.63,1 4
=(61
+383 4
)-(15.37+34.63),1 4
=100-50,
=50;
(2)24×(
+3 8
-5 6
),3 4
=24×
+24×3 8
-24×5 6
,3 4
=9+20-18,
=11;
(3)360÷[56×(
-3 7
)],3 8
=360÷[56×
-56×3 7
],3 8
=360÷[24-21],
=360÷3,
=120;
(4)(
×1.7+6 13
×1.7)÷7 13
,7 10
=(
+6 13
)×1.7×7 13
,10 7
=1×
×17 10
,10 7
=
;17 7
(5)80.7×8.7+8.07×13,
=8.07×87+8.07×13,
=8.07×(87+13),
=8.07×100,
=807;
(6)
×[8 9
-(3 5
-9 16
)],2 5
=
×[8 9
-3 5
+9 16
],2 5
=
×[1-8 9
],9 16
=
×8 9
,7 16
=
.7 18