脱式计算题简便运算
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1.老师在黑板上写了13个自然数,让小王计算平均数(保留两位小数),小王计算出的答案上12.43.老师说最后一位数字错了,其他的数字都对.请问正确的答案应该是________. 2.老王的体重的2/
脱式计算.408-12×24(46+28)×6042×50-1715÷532+105÷5(108+47)×52420×(327-238)(4121+2389)÷7671×15-974469×12+14
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
2006÷2007/2008=(2007-1)÷2007/2008=2007÷2007/2008-1÷2007/2008=2008-2008/2007=2006又2006/2007原式=9+1/3+9
题是什么,1/5×6+4/5×6=(1/5+4/5)×6=1×6=6
第1题1+1/(1+2)+1/(1+2+3)+……+1/(1+2+3+……+100)=2/(1*2)+2/(2*3)+2/(3*4)+2/(4*5)+……+2/(100*101)=4/(1*3)+4/
1、(2ac-b-c)^2-(2bc+b-c)^2={[(2ac-b-c)]+[(2bc+b-c)]}×{[(2ac-b-c)]-[(2bc+b-c)]}=(4ac-2c)(-2b)=.(2)(a+2
方法我给你写出来了,算的话就自己动手吧``````考试的时候可没人帮你算了.[亲身经历,建议学习方法自己动手算加深印象](1(1/23-1/53)X(76+23-53)(2(2.3456+5.6234
1-6/5+12/7-20/9+30/11-42/13+56/15-72/17=1-(2/1+3/1)+(3/1+4/1)-(4/1+5/4)+(5/1+6/1)-(6/1+7/1)+(7/1+8/1
四年级两位数乘一位数(1)94×8=(2)57×6=(3)9×67=(4)26×9=(5)41×9=(6)57×3=(7)7×79=(8)62×5=(9)21×1=(10)3×57=(11)5×84=
【1】原式=362*411+411-48(分母)分之363+411*362(分子)=362*411+363(分母)分之363+411*362(分子)=1【2】(1)(2005-1)/3=1005100
22×4+22121×3+41040÷2+174147+72÷89×4+4202×80÷4120×5÷2202+36÷930÷5+24081÷9+87766×5+774921+7×480×6×2770
34-34*26/27=34×(1-26/27)=34×1/27=34/27=1又7/27
1.42×(1-0.02)=42-0.84=41.162.53×(1+0.01)=53+0.53=53.533.4.37×(4.5+6.5-1)=43.74.6.38×7.2+6.38×2.8=6.3
.3/7×49/9-4/35.8/9×15/36+1/276.12×5/6–2/9×37.8×5/4+1/48.6÷3/8–3/8÷69.4/7×5/9+3/7×5/910.5/2-(3/2+4/5)
给好评,答题再问:1一25%=再答:100%-25%=75%再答:满意吗,亲再问:50%×1再答:50%再问:40%÷40%再答:1再答:你是不是不给了再问:90%+39%再问:给再问:还没完再答:如
n^4+1/4=(n^2+1/2)^2-n^2=(n^2+n+1/2)(n^2-n+1/2)=[n(n-1)+1/2][n(n+1)+1/2]分母:[(0*1+1/2)(1*2+1/2)]*[(2*3
(1)原式=304x99+304x1=304x(99+1)=304x100=30400(2)原式=7/9x5/11+2/9x5/11=(7/9+2/9)x5/11=1x5/11=5/11(3)原式=1