问题
解答题
计算下列各题(能简算的写出简算过程)
|
答案
(1)
+1 8
+6.875+5 7
,2 7
=
+1 8
+65 7
+7 8
,2 7
=(
+61 8
)+(7 8
+5 7
),2 7
=7+1,
=8;
(2)
÷7 9
+11 5
×2 9
,5 11
=
×7 9
+5 11
×2 9
,5 11
=
×(5 11
+7 9
),2 9
=
×1,5 11
=
;5 11
(3)
÷(1 3
-2 3
)×2 5
,3 5
=
÷(1 3
-10 15
)×6 15
,3 5
=
÷1 3
×4 15
,3 5
=
×1 3
×15 4
,3 5
=
;3 4
(4)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92.