问题
解答题
计算: (1)2-
(2)[2
(3)62.5%×(1
(4)51
|
答案
(1)2-
÷6 13
-9 26
+2 3
÷0.6×18 35
,2 3
=2-
×6 13
-26 9
+2 3
×18 35
×5 3
,2 3
=2-
-4 3
+2 3
,4 7
=2-(
+4 3
)+2 3
,4 7
=2-2+
,4 7
=
;4 7
(2)[2
+(5.4-21 3
)×12 3
]÷62 3
,8 9
=[2
+1 3
×27 5
-5 3
×8 3
]÷65 3
,8 9
=[
+9-7 3
]÷640 9
,8 9
=
×62 9
,9 62
=1;
(3)62.5%×(1
+32 3
)+1 6
÷1.6-1 6
,5 8
=62.5%×(1
+32 3
)+1 6
÷1.6-1 6
,5 8
=
×5 8
+29 6
×1 6
-5 8
,5 8
=(
+29 6
-1)×1 6
,5 8
=4×
,5 8
=
;5 2
(4)51
×2 3
+713 5
×3 4
+914 7
×4 5
,5 9
=(50+
)×5 3
+(70+3 5
)×7 4
+(90+4 7
)×9 5
,5 9
=50×
+3 5
×5 3
+70×3 5
+4 7
×7 4
+90×4 7
+5 9
×9 5
,5 9
═30+1+40+1+50+1,
=123.