用簡便方法計算下列各題25(,用簡便方法計算下列各題 25 (40 32) (5 7) 80 8 14 125 6 16 25 5

2021-03-19 18:38:00 字數 1762 閱讀 3540

1樓:是大可愛啦

(1)25×(40×32)

=(25×40)×32

=1000×32

=32000

(2)(5×7)×80

=(5×80)×7

=400×7

=2800

(3)8×14×125×6

=(8×125)×(14×6)

=1000×84

=84000

(4)16×25×5×4

=(16×5)×(25×4)

=90×100

=9000

(5)25×13×4

=(25×4)×13

=100×13

=1300

(6)2843-598

=2843-(600-2)

=2843-600+2

=2245

(7)4×8×25×125

=(4×25)×(8×125)

=100×1000

=100000

(8)259+468+741+532

=(259+741)+(468+532)

=1000+1000

=2000

(9)36×25

=9×4×25

=9×(4×25)

=9×100

=900

(10)12×15+12×35

=12×(15+35)

=12×50

=600

(11)31×128-28×31

=31×(128-28)

=31×100

=3100

(12)(25+250)×4

=25×4+250×4

=100+1000

=1100

(13)(125×125)×8

=125×(125×8)

=125×1000

=125000

(14)(7

12-1 5

)×60

=60×7

12-1 5

×60=35-12

=23(15)4 7

×613

+3 7

×613

=(4 7

+3 7

)×613

=1×6

13 =613

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)

2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.

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