1樓:擾龍樂戎
(1)456-199,
=456-200+1,
=256+1,
=257;
(2)0.25×5.7×4,
=0.25×4×5.7,
=1×5.7,
=5.7;
(3)252÷24-0.4×6,
=10.5-2.4,
=8.1;
(4)(3.8-1.8÷2)×12,
=(3.8-0.9)×12,
=2.9×12,
=1.45;
(5)(8+4
9)÷4,
=(8+4
9)×14,
=8×14+4
9×14,
=2+19,
=219
;(6)4.4-1
5+1.6-45,
=(4.4+1.6)-(15+4
5),=6-1,=5.
計算下面各題,能簡便計算的用簡便方法計算.4.82-5.2÷0.8×0.6 [ 1 2 -( 3 4
2樓:路肯霘
(1)4.82-5.2÷0.8×0.6,62616964757a686964616fe58685e5aeb931333335336530
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(2)[1 2
-(3 4
-3 5
)]÷7
10,=[1 2
-320
]÷710
,=720
÷710
,=1 2
;(3)7 9
×511
+2 9
×511
,=(7 9
+2 9
)×511
,=1×5
11,=5
11;(4)12.3×99,
=12.3×(100-1),
=12.3×100-12.3×1,
=1230-12.3,
=1217.7;
(5)57.5-14.25-153 4
,=57.5-(14.25+153 4
),=57.5-30,
=27.5;
(6)3.2×12.5×0.25,
=8×0.4×12.5×0.25,
=(8×12.5)×(0.4×0.25),=100×0.1,
=10.
計算下面各題,能簡便計算的要用簡便方法計算. 296+73+104+37 1600÷25÷4 125×54-46×125 50
3樓:憽人戾
(1)296+73+104+37,
=(296+104)+(73+37),
=400+110,
=510;
(2)1600÷25÷4,
=1600÷(25×4),
=1600÷100,
=16;
(3)125×54-46×125,
=125×(54-46),
=125×8,
=1000;
(4)50.34+11.645-42.34,=50.34-42.34+11.645,
=8+11.645,
=19.645;
(5)125×25×32,
=125×25×4×8,
=(125×8)×(25×4),
=1000×100,
=100000;
(6)99+99×99,
=99×(1+99),
=99×100,
=9900.
坑爹的老師要我們寒假寫數學題遞等式,或者簡便計算200道帶答案,各位大哥大姐跪求。 15
4樓:我叫朱一點
175-75÷25 68+35×13 725-(125+237)
(114+166)÷35 432÷(9×8) 189-60+40
三、簡便計算.
216+305 25×32 47+236+64
6×(15×9) 402+359 43+78+122+257
25×(26×4) 25×44 354+(229+46)
(1)9.26-4.38-2.62
(2)9.26-(4.38+2.26)
(3)9.26-(4.38-2.74
(1)4.75-9.64+8.25-1.36
(2)14.529+(2.471-3)
(3)38.68-(4.7-2.32)
415-176-24 8.29+3.7+0.71+6.3
125×89×8 428 ×78+572×78
3.遞等式計算.
15×27-3000÷25 216+64×42÷28 (324-285) ×12÷26
(1)60506-19460÷35
(2)23072÷412×65
(3)184×38+116×38-11300
(4)(79691-46354)÷629
(5)325÷13×(266-250)
(1)1.9÷(43.26+6.74)×3 (2)17.8+6.3÷(3.2-1.6)
(3)0.4×(3.2-0.8)÷1.2 (4) 5×[(3.2+4.06)÷6.05]
(5)68-(188.3-107.3)÷0.81÷0.9 (6)20.5+1.4×4÷0.4
45-30÷5=
200÷(25×4)=
40+60×2=
0×140+60=
一、計算並驗算各題.
1.100.485+72.68
4.40.043-12.87
二、用簡便方法計算.
1.125×560
2.45×71+29×45
3.13.6×8×125
4.13.6-4.25-5.75+6.4
.18.3-6.25-3.75+12.7
2.64×101
3.25×125×40×8
4.73×18+83×73
五、計算下面各題.
1.0.6+0.94-0.208
2.24.63-(4.63-1.85)
3.(64-224÷14)×12
4.1204×(38+405÷27)
①3871-(1080-740)×7 ②5175÷207+102×9
③0.9+1.08+0.92+0.1 ④13.59-6.91-0.09
⑤983×(3.8+2.2)+0.237×1000
⑥0.8×(35+65)×5÷100
⑦30-[17.8+(6.2+38÷10)]
1.10-5.4-4.6= 2.6-(2.4+2.2)x6
26×39+61×26
356×9-56×9
52×76+47×76+76
134×56-134+45×134
小數乘除法簡便計算專項練習
1.25×32×0.25 4.7×1.25×1.6 2.5×(13×4)
1.25×88 1.25×64×0.25 4.6×0.35+4.6×0.65
0.95×8.6-7.6×0.95 2.4×1.87-2.4×0.87 4.18+4.18×99
2.55×1.5+1.5+6.45×1.5 2.95×101-2.95 2.4-2.4×0.5
3.2×10.1 0.52×105 0.85×99 99×4.3
二、脫式計算.
175-75÷25 68+35×13 725-(125+237)
(114+166)÷35 432÷(9×8) 189-60+40
三、簡便計算.
216+305 25×32 47+236+64
6×(15×9) 402+359 43+78+122+257
25×(26×4) 25×44 354+(229+46)
1000―7200÷8
1242÷(103―49)
4032÷(36×2)
75×4+630 376+280÷70
9×60-320 6400÷80-64
2936÷4×4
(4280+3265)÷5
576÷3÷4
2427÷3+1995
8323÷4=
3002÷2=
234×3-574÷7 4326÷(61-58)
1.84÷7+35×4
2.540÷9-300÷6
3.480÷8+320÷4
4.120×3-90×2
5.30×4+60×5
6.488÷4-23×4
48÷8×7
3600-458+1204
493+25×7
305×(301-297)
35×8+43×5
650÷5-328÷4
四年級簡便計算題
184+98 695+202 864-199 738-301
(加減法接近整百數的簡算)
380+476+120 (569+468)+(432+131)
(加法交換律和結合律的運用)
256-147-53 373-129+29 189-(89+74) 456-(256-36)
(減法的簡算,重點:運算子號變化的處理)
28×4×25 125×32×25 9×72×125
(乘法交換律和結合律的運用,重點:一個因數分成兩個因數的處理)
720÷16÷5 630÷42
(除法的簡算)
102×35 98×42
(乘法接近整百數的簡算)
26×39+61×26 356×9-56×9
99×55+55 78×101-78
52×76+47×76+76 134×56-134+45×134
(乘法分配律的運用)
48×52×2-4×48
25×23×(40+4)
999×999+1999
5樓:
一看就是想偷懶,還是自己好好做吧孩子!
計算下列各題,能簡算的用簡便方法計算.26-3.17-7.83 67×38+33×38 125×25×64 29.38-(19.38-4.76)
6樓:ayの0077e薩
(1)26-3.17-7.83,
=26-(3.17+7.83),
=26-11,
=15;
(2)67×38+33×38,
=(67+33)×38,
=100×38,
=3800;
(3)125×25×64,
=125×25×4×8,
=(125×8)×(25×4),
=1000×100,
=100000;
(4)29.38-(19.38-4.76),=29.38-19.38+4.76,
=10+4.76,
=14.76;
(5)329×87-87×29,
=(329-29)×87,
=300×87,
=26100;
(6)5.8-3.62-0.38+0.2,=(5.8+0.2)-(3.62+0.38),=6-4,=2.
簡便計算大全五年級
7樓:新野旁觀者
0.25×
0.28
0.125×3.2×2.5
35×40.2
0.25×4÷0.25×4
3.5×99+3.5
3.5×101-3.5
3.5×9.9+3.5×0.1
3.5×2.7+35×0.73
3.5×2.7-3.5×0.7
(32+5.6)÷0.8
3.5÷0.6-0.5÷0.6
4.9÷3.5 7÷0.25÷4
7÷0.125 ÷8
7.35÷(7.35×0.25)
7.35÷(7.35÷0.25)
3.29+0.73+2.27
3.29-0.73-2.27
7.5+2.5-7.5+2.5
7.325-3.29-3.325
7.325-(5.325+1.7)
7.325-(5.325-1.7)
3.29+0.73-2.29+2.27
3.29×0.25×4
0.125×8.8
63.4÷2.5÷0.4
4.9÷1.4
3.9÷(1.3×5)
(7.7+1.54)÷0.7
2.5×2.4
2.7÷45
0.35×1.25×2×0.8
32.4×0.9+0.1×32.4
15÷0.25
28.6×101-28.6
0.86×15.7-0.86×14.7
2.4×102
14-7.32-2.68
2.65+8.67+7.35+11.33
2.31×1.2×0.5
(2.5-0.25)×0.4
9.16×1.5-0.5×9.16
3.6-3.6×0.5
7.6×0.8+0.2×7.6
0.85×199
0.25×8.5×4
0.25×36
0.125×3.2×2.5
35×40.2
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