=(100+1)×99
=100×99+99
=9999
(2)14×35
=7×2×35
=7×70
=490
(3)25×28
=25×4×7
=100×7
=700
(4)4×9×25
=4×25×9
=100×9
=900
(5)43×5×4
=43×20
=860
(6)15×12
=15×2×6
=30×6
=180
(7)12×(40-5)
=12×40-12×5
=480-60
=420
(8)74×9-14×9
=(74-14)×9
=60×9
=540
(9)35×98
=35×(100-2)
=35×100-35×2
=3500-70
=3430
(10)23×134-34×23
=23×(134-34)
=23×100
=2300
2022-08-29
整数简便运算25道
嗨害嗨
以下是我的答案:[狗头]
1、56+31+24
=(56+24)+31
=80+31
=111,
2、615+475+125
=615+(475+125)
=615+600
=1215
3、125×64
=125×8×8
=1000×8
=8000
4、 89+101+111
=101+(89+111)
=101+200
=301
5、24+127+476+573
=(24+476)+(127+573)
=500+700
=1200
6、400-273-127
=400-(273+127)
=400-400
=0
7、327+(96-127)
=327-127+96
=200+96
=296
8、70×98
=70×(100-2)
=7000-140
=6860
9、442-103-142
=442-142-103
=300-103
=197
10、999+99+9
=1000+100+10-3
=1110-3
=1107
11、67×5×2
=67×(5×2)
=67×10
=670
12、25×(78×4)
=25×4×78
=100×78
=7800
13、72×125
=9×(8×125)
=9×1000
=9000
14、9000÷125÷8
=9000÷(125×8)
=9000÷1000
=9
15、400÷25
=400÷100×4
=4×4
=16
16、25×36
=25×4×9
=100×9
=900
17、103×27
=(100+3)×27
=2700+81
=2781
18、76×102
=76×(100+2)
=7600+152
=7752
19、3600÷25÷4
=3600÷(25×4)
=3600÷100
=36
20、99×35
=(100-1)×35
=3500-35
=3465
21、(25+12)×4
=25×4+12×4
=100+48
=148
22、56×27+27×44
=(56+44)×27
=100×27
=2700
23、56×99+56
=56×(99+1)
=56×100
=5600
24、125×25×8×4
=125×8×(25×4)
=1000×100
=100000
25、25×32×125
=(25×4)×(8×125)
=100×1000
=100000
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