问题
解答题
计算下面各题,能简算的必须简算.
|
答案
(1)87×
,3 86
=(86+1)×
,3 86
=86×
+1×3 86
,3 86
=3+
,3 86
=3
;3 86
(2)24×(
+3 8
+1 6
),5 12
=24×
+24×3 8
+24×1 6
,5 12
=9+4+10,
=23;
(3)
÷5+1 3
×2 3
,1 5
=
×1 3
+1 5
×2 3
,1 5
=(
+1 3
)×2 3
,1 5
=1×
,1 5
=
.1 5
(4)
×0.375÷2 9
,6 7
=
×1 12
,7 6
=
;7 72
(5)2.4-2.4×
-4 7
,3 7
=2.4×(1-
)-4 7
,3 7
=2.4×
-3 7
,3 7
=
×(2.4-1),3 7
=
×1.4,3 7
=0.6;
(6)11.58-(7
+1.58),5 11
=11.58-1.58-7
,5 11
=10-7
,5 11
=2
.6 11