1樓:桓廣英
(1)21÷(13+2
5)÷9
11=21÷11
15÷9
11=21÷(11
15×911)
=21÷3
5=35;
(2)9
20÷[1
2×(45+2
5)]=920
÷[12×65
]=920÷35=3
4;(3)5.65-6.29+5.35-2.71=(5.65+5.35)-(6.29+2.71)=11-9
=2;(4)3.7×99+3.7
=3.7×(99+1)
=3.7×100
=370.
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
2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.
計算下面各題,怎樣簡便就怎樣計算,要寫出必要的計算過程.①44×25②6200÷25÷4③65×5-35÷5④362-(
3樓:尉遲俟兜
①44×25,
=11×4×25,
=11×(4×25),
=11×100,
=1100;
②6200÷25÷4,
=6200÷(25×4),
=6200÷100,
=62;
③65×5-35÷5,
=325-7,
=318;
④362-(16+27)×4,
=362-43×4,
=362-172,
=190;
⑤51.27-8.66-1.34,
=51.27-(8.66+1.34),
=51.27-10,
=41.27;
⑥75+12.7+25+6.3,
=(75+25)+(12.7+6.3),
=100+19,
=119.
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
4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,能簡便計算的用簡便方法計算.4.82-5.2÷0.8×0.6 [12-(34-35)]÷710 79×511+29×511
5樓:手機使用者
(1)4.82-5.2÷0.8×
0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(2)[1
2-(34-3
5)]÷710,
=[12
-320
]÷710,=7
20÷710,
=12;(3)79×5
11+29×5
11,=(79+29
)×511
,=1×511,
=511
;(4)12.3×99,
=12.3×(100-1),
=12.3×100-12.3×1,
=1230-12.3,
=1217.7;
(5)57.5-14.25-1534,
=57.5-(14.25+1534),
=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,能用簡便方法計算的要用簡便方法計算
2.2 3.83 11 5 5.17 115 115 3.83 11 5 5.17 115,3.83 5.17 1 115,10 115,22 2.5 2.4 1.84 5.16 6 1.84 5.16 6 7,13 7.8 32 1 5 8 3.6 7.8 32 3 8 3.6 7.8 12 3....
計算下面各題,能簡便計算的要簡便計算
1du4 5 3 4 110 zhi 16 20 15 20 2 20,3 20 2dao3 8 6 7 5 8 3 8 5 8 6 7 16 7 3版8 9 權5 6 1 6 8 9 2 3 2 9.計算下面各題,能簡便計算的要簡便計算.5.27 1.98 0.02 3.2 5.7 6.8 15....
計算下面各題能簡便的用簡便方法計算
bai1 10.15 10.75 du0.4 5.7,zhi 10.15 4.3 5.7,10.15 dao4.3 5.7 10.15 10,0.15 2 5.8 3.87 0.13 4.2 3.74,5.8 3.74 4.2 3.74,5.8 4.2 專3.74,10 3.74,37.4 3 32...