1樓:匿名使用者
3.2×12.5×0.25
=12.5×0.8×0.25×4
=10×1
=10;
45×0.99
=0.45×99
=0.45×(100-1)
=45-0.45
=44.55;
0.1÷0.02+0.45×0.01
=5+0.0045
=5.0045;
40.5÷0.18-0.875×32
=225-28
=197;
(6.7-1.69÷1.3)×400
=6.7×400-0.13×400
=2680-52
=2628;
7.5×99.9
=7.5×(100-0.1)
=750-0.75
=749.25;
如果本題有什麼不明白可以追問,如果滿意記得采納如果有其他問題請採納本題後另發點選向我求助,答題不易,請諒解,謝謝。
祝學習進步
2樓:匿名使用者
3.2×12.5×0.25
=4*0.8*12.5*0.25
=1*10=10
45×0.99
=45*(1-0.01)
=45-0.45
=44.55
0.1÷0.02+0.45×0.01
=0.1*50+0.1*0.045
=0.1*(50+0.045)
=5.0045
40.5÷0.18-0.875×32
=90/2*5/9-7/8*32
=250-28
=222
(6.7-1.69÷1.3)×400
=(6.7-1.3)*400
=5.4*400
=2160
7.5×99.9
=7.5*(100-0.1)
=750-0.75
=749.25
用遞等式計算,能簡便的要簡便60+40×3 &n...
3樓:天堂罪嗕膃幟殥
(dao1)60+40×3
=60+120
=180;
(版2)權125-25÷5
=125-5
=120;
(3)1100÷25÷4
=1100÷(25×4)
=1100÷100
=11;
(4)672÷(24-12)
=672÷12
=56;
(5)120+78÷13
=120+6
=126;
(6)9000-271-729
=9000-(271+729)
=9000-1000
=8000.
28-7+11.3x0.5,測試計算能簡便的要簡便運算。
4樓:使用者名稱用
28-7+11.3x0.5計算過程如下
28-7+11.3x0.5
=21+(11+0.3)×0.5
=21+5.5+0.15
=26.65
如滿意請採納
5樓:匿名使用者
簡便運算為:11.3變成11+0.3
=21+(11+0.3)×0.5乘法分配律=21+11×0.5+0.5×0.3
=21+5.5+0.15
=26.5+0.15
=26.65
計算下面各題能簡便的要簡便28.5x10.1等於多少?
6樓:
28.5x(10+0.1)=285+2.85=287.85這題結果是二百八十七點八五
7樓:
28.5×10.1
=28.5×(10+0.1)
=285+2.85
=287.85
8樓:52個星期天
28.5×10.1
=28.5×(10+0.1)
=28.5×10+28.5x0.1
=285+2.85
=287.85
9樓:
28.5x10.1=28.5x(10+0.1)=285+2.85=287.85
能簡便的要簡便計算103*0.25?
10樓:二聰
103*0.25
=(100+3)* 1/4
=100* 1/4+3/4
=25+3/4
=25又3/4
11樓:仰望北斗
原式=(100+3)x0.25
=100x0.25+3x0.25
=25+0.72
=25.75
12樓:激情
103ⅹ0.25
=103x1/4
=25.75
13樓:網上招開
103×0.25簡便方法如下:
=(100+3)x0.25
=100x0.25+3x0.25
=25+0.75
=25.75
一、脫式計算。(能簡便的要簡便) (0.2+6.37÷0.7)×0.5
14樓:匿名使用者
(0.2+6.37÷0.7)×
0.5=0.2×0.5+6.37÷0.7×0.5=0.1+9.1×0.5
=0.1+4.55
=4.65
5.7×2.9+4.3×2.9
=(5.7+4.3) ×2.9
=10×2.9
=291.6×1.25×2.5
=2×2.5
=510.1×4.8
=(10+0.1)×4.8
=10×4.8+0.1×4.8
=48+0.48
=48.48
15樓:匿名使用者
親,先把我列入滿意答案,再告訴你怎麼做?
列遞等式計算(能簡便的要用簡便方法計算)800-600÷20 18×(84-48)3...
16樓:匿名使用者
解答:解:(1)800-600÷20
=800-30
=770;
(2)18×(84-48)
=18×36
=648;
(3)35×18
=35×2×9
=630;
(4)329+186+14
=329+(186+14)
=329+200
=529;
(5)25×37×4
=25×4×37
=3700;
(6)720÷16÷5
=720÷(16×5)
=720÷90=8.
遞等式計算,能簡便的要簡便
17樓:★魯魯修
(1)25×32×0.25
=25×4×2×4×0.25
=(25×4)×(4×0.25)×2
=100×1×2
=200;
(2)0.25×(0.4+40)
=0.25×0.4+40×0.25
=0.1+10
=10.1;
(3)0.67+1.28+9.33+0.72=(0.67+9.33)+(1.28+0.72)=10+2
=12;
(4)3.18-(0.33+1.18)
=3.18-0.33-1.18
=(3.18-1.18)-0.33
=2-0.33
=1.67;
(5)6.3÷35
=6.3÷(7×5)
=(6.3÷7)÷5
=0.9÷5
=0.18;
(6)[1-(0.5-0.25)]×0.6=[1-0.25]×0.6
=0.75×0.6
=0.45;
(7)7.8×0.9+0.78
=0.78×9+0.78
=0.78×(9+1)
=0.78×10
=7.8;
(8)1.9-1.9×(1.9-1.9)
=1.9-1.9×0
=1.9-0
=1.9.
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