知识大全 脱式计算下面各题,能简算的要简算.①8250÷25-33②6.35×29+7.1×63.5③( 45-23)÷( 2
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篇首语:老板给了我份说炒就炒的鱿鱼,我给了板来了份说滚就滚的旅行。本文由小常识网(cha138.com)小编为大家整理,主要介绍了知识大全 脱式计算下面各题,能简算的要简算.①8250÷25-33②6.35×29+7.1×63.5③( 45-23)÷( 2相关的知识,希望对你有一定的参考价值。
脱式计算下面各题,能简算的要简算.①8250÷25-33②6.35×29+7.1×63.5③( 45-23)÷( 2
①8250÷25-33
=330-33,
=297;
②6.35×29+7.1×63.5
=6.35×29+71×.35,
=6.35×(29+71),
=6.35×100,
=635;
③(
4 |
5 |
-
2 |
3 |
)÷(
2 |
3 |
+
1 |
4 |
)
=
2 |
15 |
÷
11 |
12 |
,
=
8 |
55 |
;
④(
3 |
4 |
+
7 |
8 |
÷
14 |
15 |
)×
8 |
9 |
=(
3 |
4 |
+
15 |
16 |
)×
8 |
9 |
,
=
27 |
16 |
×
8 |
9 |
,
=
3 |
2 |
.
计算下列各题,能简算的要简算:(1)(4800÷75+36)×12 (2)29÷[56×(45-23)] (3)3.8×99+3.8
(1)(4800÷75+36)×12,
=(64+36)×12
=100×12,
=1200;
(2)
2 |
9 |
÷[
5 |
6 |
×(
4 |
5 |
?
2 |
3 |
)],
=
2 |
9 |
÷[
5 |
6 |
×(
12 |
15 |
?
10 |
15 |
)],
=
2 |
9 |
÷[
5 |
6 |
×
2 |
15 |
],
=
2 |
9 |
÷
1 |
9 |
,
=
2 |
9 |
×9,
=2;
(3)3.8×99+3.8,
=3.8×(99+1)
=3.8×100,
=380;
(4)42×
40 |
41 |
,
=(41+1)×
40 |
41 |
,
=41×
40 |
41 |
+
40 |
41 |
,
=40
40 |
41 |
;
(5)(
1 |
2 |
+
2 |
3 |
-
1 |
4 |
)÷
1 |
24 |
,
=
1 |
2 |
×24+
2 |
3 |
×24-
1 |
4 |
×24,
=12+16-6,
=22;
(6)7.8-3.6+2.2-6.4,
=7.8+2.2-(3.6+6.4),
=10-10,
=0.
用递等式计算下面各题,能简算的要简算
7.8×5.6+2.3×4.4
=(2.3+5.5)×5.6+2.3×4.4
=2.3×5.6+5.5×5.6+2.3×
4.4
=2.3×(5.6+4.4)+5.5×5.6
=23+5.5×(4+1.6)
=23+5.5×4+5.5×1.6
=23+22+5.5×1+5.5×0.6
=55+5.5+3.3
=63.8
计算下面各题,能简算的要简算. 0.89×100.1 146.5-(23+46.5) 5
(1)0.89×100.1, =0.89×(100+0.1), =89+0.089, =89.089;(2)146.5-(23+46.5), =146.5-23-46.5, =146.5-46.5-23, =100-23, =77; (3)5.83×2+5.83×8, (4)45.9÷8÷0.125, |
计算下面各题,能简算的要简算①31.9×18-8×31.9②21÷(13+25)÷911③(23+215)×45④(1-1100×70)
①31.9×18-8×31.9,
=31.9×(18-8),
=31.9×10,
=319;
②21÷(
1 |
3 |
+
2 |
5 |
)÷
9 |
11 |
,
=21÷
11 |
15 |
÷
9 |
11 |
,
=21×
15 |
11 |
×
11 |
9 |
,
=35;
③(
2 |
3 |
+
2 |
15 |
)×45,
=
2 |
3 |
×45+
2 |
15 |
×45,
=30+6,
=36;
④(1-
1 |
100 |
×70)÷
2 |
7 |
,
=(1-
7 |
10 |
)÷
2 |
7 |
,
=
3 |
10 |
×
7 |
2 |
,
=
21 |
20 |
;
⑤12×(
1 |
4 |
+
1 |
6 |
-
1 |
3 |
),
=12×
1 |
4 |
+12×
1 |
6 |
-12×
1 |
3 |
,
=3+2-4,
=1;
⑥(
3 |
8 |
-0.125)÷0.5,
=(0.375-0.125)÷0.5,
=0.25÷0.5,
=0.5.
计算下面各题,能简算的要简算. (45+14)÷73+71079×(23-27) 415×613+613÷1511
(1)(
4 |
5 |
+
1 |
4 |
)÷
7 |
3 |
+
7 |
10 |
=
21 |
20 |
÷
7 |
3 |
+
7 |
10 |
=
9 |
20 |
+
7 |
10 |
=
23 |
20 |
;
(2)
7 |
9 |
×(
2 |
3 |
-
2 |
7 |
)
=
7 |
9 |
×
2 |
3 |
-
7 |
9 |
×
2 |
7 |
=
14 |
27 |
-
2 |
9 |
=
8 |
27 |
;
(3)
4 |
15 |
×
6 |
13 |
+
6 |
13 |
÷
15 |
11 |
=
4 |
15 |
×
6 |
13 |
+
6 |
13 |
×
11 |
15 |
=(
4 |
15 |
+
11 |
15 |
)×
6 |
13 |
=1×
6 |
13 |
=
6 |
13 |
.
计算下面各题,能简算的要简算.0.89×100.1146.5-(23+46.5)10÷0.
(1)0.89×100.1
=0.89×(100+0.1)
=0.89×100+0.89×0.1
=89+0.089
=89.089
(2)146.5-(23+46.5)
=146.5-46.5=23
=100-23
=77
(3)10÷0.2÷2.5
=10÷(0.2×2.5)
=100÷0.5
=200
(4)64×4.5+36×4.5
=(64+36)×4.5
=100×4.5
=450
(5)0.125×32×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
(6)1.25×3.2×0.8
=(1.25×0.8)×3.2
=1×3.2
=3.2
计算下面各题,能简算的要简算:7.54+127+2.46+1670.4÷154+25×41
7.54+
12 |
7 |
+2.46+
16 |
7 |
,
=(7.54+2.46)+(
12 |
7 |
+
16 |
7 |
),
=10+4,
=14;
0.4÷
15 |
4 |
+
2 |
5 |
×
4 |
15 |
,
=
2 |
5 |
×
4 |
15 |
+
2 |
5 |
×
4 |
15 |
,
=
2 |
5 |
×(
4 |
15 |
+
4 |
15 |
),
=
2 |
5 |
×
8 |
15 |
,
=
16 |
75 |
;
3 |
23 |
÷(
6 |
7 |
?
5 |
6 |
×
3 |
10 |
),
=
3 |
23 |
÷(
6 |
7 |
-
1 |
4 |
),
=
3 |
23 |
÷
17 |
28 |
,
=
84 |
391 |
;
99×
23 |
25 |
+
23 |
25 |
,
=(99+1)×
23 |
25 |
,
=100×
23 |
25 |
,
=92.
计算下面各题,能简算的要简算. 3.2×5-12 146.5-(23+46.5) 5.83×
(1)3.2×5-12, =16-12, =4;(2)146.5-(23+46.5), =146.5-23-46.5, =146.5-46.5-23, =100-23, =77; (3)5.83×2+4.27, (4)0.5×4×2.33, |
计算下面各题,能简算的要简算.35+71+29+65 125×5×8×2 43×23+57×23 [250-(43+132)]×18 90
(1)35+71+29+65,
=(35+65)+(71+29),
=100+100,
=200;
(2)125×5×8×2,
=(125×8)×(5×2),
=1000×10,
=10000;
(3)43×23+57×23,
=(43+57)×23,
=100×23,
=2300;
(4)[250-(43+132)]×18,
=[250-175]×18,
=75×18,
=1350;
(5)900÷[3×(48-23)],
=900÷(3×25),
=900÷75,
=12;
(6)99×76,
=(100-1)×76,
=100×76-1×76,
=7600-76,
=7524.
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