1樓:小風颼颼吹
分數用baia/b就可以表示三分之二就du是2/3如果有zhi除法就用(算式)
dao/(算式)
你算的都對!
其他的問版
題的答權案是
3/4也就是4分之3(0.75)
100/9也就是9分之100即11又9分之1(11.1111111)4/5也就是5分之4(0.8)
2.19/3+1/3*9/100-0.01=219/300+9/300-1/100
=219/300+9/300-3/300
=225/300
=75/100=0.75
36/10分之9/360%
=36/(9/10)/3.6
=36*10/9/3.6
=40/3.6
=100/9
5分之1*370%+6.3/5-1.2
=1/5*3.7+6.3/5-1.2
=3.7/5+6.3/5-1.2
=2-1.2
=0.8
2樓:匿名使用者
3/4100/9
4/5都通分了 分母是一樣的,然後分子相加減
這裡不好打分數
3樓:匿名使用者
2.19/3+1/3*9/100-0.01=2.19/3+3/100-0.01
=219/300+9/300-3/300
=225/300
=3/4
36/10分之9/360%
=36/(9/10)/3.6
=36*10/9/3.6
=40/3.6
=100/9
5分之1*370%+6.3/5-1.2
=1/5*3.7+6.3/5-1.2
=3.7/5+6.3/5-1.2
=2-1.2
=0.8
4樓:卪縋ぷ懜
計算自己練不是更好嗎...誒...偶也是回來練計算能力的了...中學以後計算用得都很少.不練練專會老屬的.不廢話了
2.19/3+3分之1*100分之9-0.01=3/100+1/3-9/100-1/100
=65/100+1/3
=39/60+20/60=59/60
36/10分之9/360%=36*10/9*100/360
=100/9
5分之1*370%+6.3/5-1.2=37/50+63/50-60/50
=4/5
要檢驗的第2題我算出的是0 第3題是好象也錯了..其他的你自己來吧...鍛鍊下
5樓:勢怡風豔蕙
24乘43分之51+51乘43分之19
=24x(51/43)+51x19/43
=24x(51/43)+19x51/43
=(51/43)(24+19)
=(51/43)x43
=519999乘7+1111乘37
=1111(9x7+37)
=1111x100
=111100
=231÷(231+231/232)
=231÷231÷(1+1/232)
=1÷233/232
=232/233
4.85除以18分之5-3.6+6.
15乘35分之3=4.85x18/5-18/5+6.15x3/35=(4.
85-1)x18/5+6.15x3/35=0.77x18+3.
69/7
(9.1乘4.8乘7.
5)除以(0.25乘1.3乘1.
6)=(7.5÷0.25)(4.
8÷1.6)(9.1÷1.
3)=30x3x7
=630
8.9乘10.1除以10.1+99乘89
=8.9+99x89
=8.9+100x89-89
=8900-80.1
=8819.9
1除以(2除以3)除以(3除以4)除以(4除以5)除以(5除以6)除以(6除以7)除以(7除以8)
6樓:ly欣欣
第一題等於0.75
第二題是100/9
第三題4/5
你的都對的..
7樓:藕滴→世界
0.75
100/9
0.8應該都對了吧```
50道簡便計算題及答案
8樓:匿名使用者
????????????????????????????????????????????
9樓:匿名使用者
你的第一個題錯了吧!
10樓:匿名使用者
應該這樣( ˙-˙ )
11樓:雪天裡的風是刀
山jj超級錦鯉觸控式螢幕
12樓:匿名使用者
歐了吳翠本土烤魚拉動
13樓:贊成利利
蠟筆賤人就是矯情利人利己拆
14樓:匿名使用者
望採納謝謝。(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×(
e5a48de588b662616964757a686964616f313333633731389.5+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運用加法交換律進行簡便計算。
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運用加法結合律進行簡便計算
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、運用乘法交換律進行簡便計算。
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、運用乘法結合律進行簡便計算。
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、運用乘法分配律的加法進行簡算。
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、運用乘法分配律的減法進行簡算。
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、運用減法的運算規律進行簡便計算。
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、運用除法的運算規律進行簡便計算。
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綜合運用各種運算定律進行簡算。
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
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