知识大全 用脱式计算下面各题(能简算的要简算). 6760÷13+17×25 0.25+57+6.75+27 3763÷7+2663×17 63÷[3
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用脱式计算下面各题(能简算的要简算). 6760÷13+17×25 0.25+57+6.75+27 3763÷7+2663×17 63÷[3
(1)6760÷13+17×25,
=520+425,
=945;
(2)0.25+
5 |
7 |
+6.75+
2 |
7 |
,
=(0.25+6.75)+(
5 |
7 |
+
2 |
7 |
),
=7+1,
=8;
(3)
37 |
63 |
÷7+
26 |
63 |
×
1 |
7 |
,
=(
37 |
63 |
+
26 |
63 |
)×
1 |
7 |
,
=1×
1 |
7 |
,
=
1 |
7 |
;
(4)63÷[
3 |
5 |
×(0.7+
4 |
5 |
)],
=63÷[
3 |
5 |
×1.5],
=63÷0.9,
=70.
计算下面各题,能简算的要简算. 8 17 ÷23+ 1 23 × 9 17 0.25
①
×
,
×
+
×
,
+
)×
,
,
; ②0.25×1.25×32, ③3.6-2.8+7.4-7.2, ④41×101, |
计算,能简算的要简算 (1)4.82-5.2÷0.8×0.6 (2)125×32 (3)6760÷13+17×25 (4
(1)4.82-5.2÷0.8×0.6
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(2)125×32
=125×8×4,
=1000×4,
=4000;
(3)6760÷13+17×25
=520+425,
=945;
(4)57.5-4.25-15.75
=57.5-(4.25+15.75),
=57.5-20,
=37.5;
(5)
5 |
7 |
×16.31-
5 |
7 |
×2.31
=
5 |
7 |
×(16.31-2.31),
=
5 |
7 |
×14,
=10.
计算下面各题,能简算的要简算:(45+14)÷73+7102536×45+1136÷5498+99×986760÷13+17×2525.12-7.32
(1)(
4 |
5 |
+
1 |
4 |
)÷
7 |
3 |
+
7 |
10 |
=
21 |
20 |
÷
7 |
3 |
+
7 |
10 |
=
9 |
20 |
+
7 |
10 |
=1
3 |
20 |
;
(2)
25 |
36 |
×
4 |
5 |
+
11 |
36 |
÷
5 |
4 |
=(
25 |
36 |
+
11 |
36 |
)×
4 |
5 |
=1×
4 |
5 |
=
4 |
5 |
;
(3)98+99×98
=(1+99)×98
=100×98
=9800;
(4)6760÷13+17×25
=520+425
=945;
(5)25.12-7.32-2.68
=25.12-(7.32+2.68)
=25.12-10
=15.12.
计算下面各题.(能简算的要简算)85-338÷916×23÷(45-815)27×34+0.25×270.6×25%+13×4.
(1)85-3
3 |
8 |
÷9
=85-
27 |
8 |
×
1 |
9 |
,
=85-
3 |
8 |
,
=84
5 |
8 |
;
(2)
1 |
6 |
×
2 |
3 |
÷(
4 |
5 |
-
8 |
15 |
)
=
1 |
6 |
×
2 |
3 |
÷
4 |
15 |
,
=
1 |
9 |
×
15 |
4 |
,
=
5 |
12 |
;
(3)
2 |
7 |
×
3 |
4 |
+0.25×
2 |
7 |
=
2 |
7 |
×
3 |
4 |
+
1 |
4 |
×
2 |
7 |
,
=(
3 |
4 |
+
1 |
4 |
)×
2 |
7 |
,
=1×
2 |
7 |
,
=
2 |
7 |
;
(4)0.6×25%+
1 |
3 |
×4
=
3 |
5 |
×
1 |
4 |
+
计算下面各题,能简算的要简算.575-75÷25×427×96+27×3+27
(1)575-75÷25×4,
=575-3×4,
=575-12,
=563;
(2)27×96+27×3+27,
=27×(96+3+1),
=27×100,
=2700.
用递等式计算下面各题:(能简算的要简算,)0.125×0.25×32 &...
①0.125×0.25×32
=(0.125×8)×(0.25×4)
=1×1
=1
②4.2-1.38+5.8-3.62
=(4.2+5.8)-(3.62+1.38)
=10-5
=5
③
3 |
5 |
×8.8+0.6×
1 |
5 |
+60%
=0.6×(8.8+
1 |
5 |
+1)
=0.6×11
=6.6
④4-[3.75×(1.2-
1 |
3 |
)+
3 |
4 |
]
=4-[3.75×1.2-3.75×
1 |
3 |
+0.75]
=4-[4.5-1.25+0.75]
=4-[3.25+0.75]
=4-4
=0
计算下列各题.(能简算的要简算) 17 24 × 3 4 + 17 24 ÷4 1
(1)
+
÷4 ,
×
+
×
,
×(
+
) ,
×1,
; (2)
×3.2+5.6×0.5+1.2×50% , (3) 510÷[42×(
-
)] ,
-42×
] , (4)
+(
-
)÷
,
+
÷
,
+
,
. |
计算下面各题,能简算的要简算 480+27×8 &nb...
(1)480+27×8
=480+216
=696;
(2)15.7-2.17-1.83
=15.7-(2.17+1.83)
=15.7-4
=11.7;
(3)46×101-46
=46×(101-1)
=46×100
=4600;
(4)(
5 |
6 |
-
1 |
3 |
)×(
5 |
8 |
÷
1 |
4 |
)
=
1 |
2 |
×
5 |
2 |
=
5 |
4 |
;
(5)24×(
1 |
4 |
+
1 |
6 |
-
1 |
3 |
)
=24×
1 |
4 |
+24×
1 |
6 |
-24×
1 |
3 |
=6+4-8
=10-8
=2;
(6)[1-(
3 |
8 |
+
1 |
4 |
)]÷
1 |
4 |
=[1-
5 |
8 |
]÷
1 |
4 |
=
3 |
8 |
÷
1 |
4 |
=
3 |
2 |
.
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