計算下面各題,能簡便的要用簡便方法計算

2021-05-22 16:01:40 字數 3002 閱讀 7914

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

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計算下面各題,能簡便計算的要簡便計算

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