导航:首页 > 知识科普 > 114乘12的简便计算方法

114乘12的简便计算方法

发布时间:2023-10-06 06:34:30

1. 简便计算大全

简便计算大全
(1)2.5*32*0.125
=(2.5*4)*(8*0.125)
=10*1
=10

(2)3.5-7+6.5
=3.5+6.5-7
=3

(3)1.2×2.5+0.8×2.5
=2.5(1.2+0.8)
=25

(4)8.9×1.25-0.9×1.25
=1.25(8.9-0.9)
=10

(5)12.5×7.4×0.8
=12.5×0.8×7.4
=74

(6)6.5×9.5+6.5×0.5
=6.5×(9.5+0.5)
=6.5×10
=65

(7)0.35×1.6+0.35×3.4
=0.35*(1.6+3.4)
=0.35*5
=1.75

(8)6.72-3.28-1.72
=6.75-(3.28+1.72)
=6.75-5
=1.75

(9)0.45+6.37+4.55
=0.45+4.55+6.37
=5+6.37
=11.37

(10)28×12.5-12.5×20
=(28-20)*12.5
=8*12.5
=100

(11)23.65-(3.07+3.65)
=23.65-3.65-3.07
=20-3.07
=16.93

(12)(4+0.4×0.25)8×7×1.25

=(4+1)*7*10
=5*7*10
=350

(13)1.65×99+1.65
=1.65*(99+1)
=1.65*100
=165

(14)27.85-(7.85+3.4)
=27.85-7.85+3.4
=20+3.4
=23.4

(15)48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
=7.8*(9.9+0.1)
=7.8*10
=78

(16)4.8×46+4.8×54
=(46+54)*4.8
=100*4.8
=480

(17)673-327-173
=673-(327+173)
=673-500
=173

(18)4.44*2.5
=1.11*(4*2.5)
=1.11*10
=11.1

(19)3.5÷1.4
=(3.5÷0.7)÷(1.4÷0.7)
=5÷2
=2.5

(20)1+2+3+4+5......+99+100
=(1+99)+(2+98)+(3+97)+......+(49+51)+50
=(100÷2-1)*100+50
=4900+50
=4950⑴运用加法交换律进行简便计算。
0.88+5.6+0.12 1.78+3.5+0.22 5.6+2.08+14.4
=0.88+0.12+5.6 =1.78+0.22+3.5 =5.6+14.4+2.08
=1+5.6 =2+3.5 =20+2.08
=6.6 =5.5 =22.08
⑵运用加法结合律进行简便计算
2.3+(0.56+4.7) 28.6+0.54+0.46+1.4 5.82+4.56+5.44
=(2.3+4.7)+0.56 =(28.6+1.4)+(0.54+0.46) =5.82+(4.56+5.44)
=7+0.56 =30+1 =5.82+10
=7.56 =31 =15.82
⑶、运用乘法交换律进行简便计算。
25×0.37×0.4 7.5×0.39×4 6.5×1.1×4 1.25×3.9×0.8
=25×0.4×0.37 =7.5×4×0.39 =6.5×4×1.1 =1.25×0.8×3.9
=10×0.37 =30×0.39 =26×1.1 =1×3.9
=3.7 =11.7 =28.6 =3.9
⑷、运用乘法结合律进行简便计算。
1.9×7.5×8 6.2×0.8×2.5 4.3×1.5×6 4.1×3.5×2
=1.9×(7.5×8) =6.2×(0.8×2.5) =4.3×(1.5×6) =4.1×(3.5×2)
=1.9×60 =6.2×2 =4.3×9 =4.1×7
=114 =12.4 =38.7 =28.7
⑸、运用乘法分配律的加法进行简算。
13.6×4.6+4.6×6.4 0.72×23+77×0.72 2.6×32+32×2.4
=(13.6+6.4)×4.6 =(23+77)×0.72 =(2.6+2.4) ×32
=20×6.4 =100×0.72 =5×32
=128 =72 =160
⑹、运用乘法分配律的减法进行简算。
12×5.9-5.9×2 4.6×2.5-2.5×0.6 101×9.7-9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=10×5.9 =4×2.5 =100×9.7
=59 =10 =970
⑺、运用减法的运算规律进行简便计算。
1.8-0.45-0.55 54.4-4.6-5.4 35.6-0.13-0.47
=1.8-(0.45+0.55) =54.4-(4.6+5.4) =35.6-(0.13+0.47)
=1.8-1 =54.4-10 =35.6-0.6
=0.8 =44.4 =35
⑻、运用除法的运算规律进行简便计算。
4.5÷4÷7.5 14.8÷1.25÷8 18.5÷4÷1.25 5.4÷4÷0.45
=4.5÷(4×7.5) =14.8÷(1.25×8) =18.5÷(4×1.25) =5.4÷(4×0.45)
=4.5÷30 =14.8÷10 =18.5÷5 =5.4÷0.18
=0.15 =1.48 =3.7 =30
⑼综合运用各种运算定律进行简算。
2.54+2.46+0.44+0.54 10.7×0.4-6.7×0.4 0.5×3.2×1.25
=(2.54+2.46)+(0.44+0.54) =(10.7-6.7)×0.4 =(0.5×4)×(0.8×1.25)
=5+1 =4×0.4 =2×1
=6 =1.6 =2
89.7+5.8-9.7+4.2 99×0.38+0.38 360÷(18×0.4)
=(89.7-9.7)+(5.8+4.2) =(99+1) ×0.38 =360÷18÷0.4
=80+10 =100×0.38 =20÷0. 4
=90 =38 =50
4.8×12.5 2.5×1.6×12.5 3.2×102
=0.6×(8×12.5) =(2.5×0.2)×(8×12.5) =3.2×(100+2)
=0.6×100 =0.5×100 =3.2×100+3.2×2
=60 =50 =320+6.4
=326.4

2. 124乘以12的简便运算法

124乘以12,乘数乘以乘数先从各位乘起,乘完个位乘十位,然后把结果加在一起就行了。

3. 12的乘法巧算方法

十几乘以十几是头乘头、尾相加、尾相乘。比如12×13=156。而到了二十几乘以二十n 几,则任意两位数乘以任意两位数,其方法是头乘头、尾乘尾、头乘以后面的尾,尾乘以后 面的头,两个得数相加再补加个0。比如:24×25它用2×2=44×5=202×4=82×5= 1010+8=18然后补0也就是180(实际是24×25=420+180=600)

4. 104乘12的简便计算

104*12

  1. =(100+4)*12

    =100*12+4*12

    =1200+48

    =1248

  2. =104*(10+2)

    =104*10+104*2

    =1040+208

    =1248

5. 乘以12怎样用简便方法计算

一个数乘以12,=一个数x10+一个数x2。如:8x12=8x10+8x2=80+16=96

6. 104×12用简便方法计算

等式为乘法,并且104可以转换为100=4运算更方便,在根据乘法分配律,得出:
(100+4)x12
=100x12+4x12
=120+48
=168

阅读全文

与114乘12的简便计算方法相关的资料

热点内容
女性用产卵器的使用方法 浏览:119
打8折怎么算计算方法 浏览:243
修水管后太阳能不上水解决方法 浏览:920
球星后撤步训练方法 浏览:662
本草纲目中治疗白癜风方法 浏览:966
无人机飞行高度解决方法 浏览:79
心理格板分析方法 浏览:36
流派研究的方法 浏览:430
衬衣短了如何加长改大的方法 浏览:654
蓝螃蟹的裁剪方法视频 浏览:192
正能量哑铃锻炼方法 浏览:661
飞机膨胀螺丝使用方法 浏览:58
苹果ipad耗电太快怎么解决方法 浏览:314
钢筋量计算方法 浏览:822
什么方法不能为图层添加图层蒙版 浏览:936
棱镜基座使用方法 浏览:496
变速杆安装方法 浏览:845
科目三靠边停车最简单的方法对点 浏览:986
s7变速箱顿挫解决方法 浏览:591
即将开学的方法和技巧 浏览:184