用简便方法计算下列各题 25×(40×32); (5×7)×80; 8×14×125×6; 16×25×5×4; 25×

用简便方法计算下列各题 25×(40×32); (5×7)×80; 8×14×125×6; 16×25×5×4; 25×13×4; 2843-598; 4×8×25×125; 259+468+741+532; 36×25; 12×15+12×35; 31×128-28×31; (25+250)×4; (125×125)×8; ( 7 12 - 1 5 )×60; 4 7 × 6 13 + 3 7 × 6 13 .

(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
×
6
13
+
3
7
×
6
13

=(
4
7
+
3
7
)×
6
13

=1×
6
13

=
6
13
温馨提示:答案为网友推荐,仅供参考