2.37×0.69 76.3×0.069怎么简算
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原式=1.28*2.37-2.8/10*10*0.237=1.28*2.37-0.28*2.37=(1.28-0.28)*2.37=2.37
0.9+(0.9-0.9)*0.9-0.9=0.9+0-0.9=02.37-1.75+1.63-2.25=2.37+1.63-2.25-1.75=4-4=00.125*0.25*0.5*64=0.5^
1.63+2.37÷0.3=1.63+7.9=9.53
2.37*0.1+23.7*0.09=2.37*0.1+2.37*0.9=2.379999*7778+3333*6666=9999*7778+3333*3*2222=9999*7778+9999*22
按行列式的定义来做:行列式定义中共有n!项.其每一项由行列式中每行每列恰取一个数(共n个数)做乘积,此项正负号的确定:行标按自然顺序排,列标排列的逆序数为奇数时为负,列标排列的逆序数为偶数时为正所以.
奥数?打字不易,如满意,望采纳.
(1)2.37×6.3+2.37×3.7=2.37×(6.3+3.7)=2.37×10=23.7;(2)2.5×1.25×0.32=2.5×1.25×0.8×0.4=(2.5×0.4)×(1.25×0
最后一问就是电流表与电阻箱串联,但注意要考虑到电流表的内阻,据闭合电路欧姆定律:E=I(r+0.2+R),整理后E/I=r+0.2+R,从图中读出两个特殊点带入上式即可得出所给结果:比如从图中读出R=
中间是加号吧(2.63+3/8)*(25+2/5)+(2.37-3/8)*(25+2/5)=(2.63+2.37+3/8-3/8)(25+2/5)=5x(25+2/5)=5x25+5x2/5=125+
789*4=3200、5392/9=600、99.75+999.75=1100、7.37-1.63+2.37=8
题目应该是:2.37*6.3+2.37*3.7?2.37*6.3+2.37*3.7=2.37*(6.3+3.7)=2.37*10=23.7
原式=2.37x6.3+2.37x3.7=2.37x(6.3+3.7)=2.37x10=23.7
=2.37*(12.45+21.58+65.97)=2.37*100=237
(2.37+7.63)x0.3
99x2.37+3.37=99x2.37+2.37+1=2.37x(99+1)+1=237+1=238
2.37×2.7=2.37×(3-0.3)=2.37×3-2.37×0.3=7.11-0.711=6.399
2.37*52.5+0.63*52.5-2*52.5=52.5(2.37+0.63-2)=52.5*1=52.5
2.37除以4减1.37乘以25%=(2.27-1.37)x0.25=0.254%乘以25%+2/3乘以30%=1+0.2=1.2解方程:x减15%x=2.040.85x=2.04x=2.43/5乘以
原式=(99+1)×2.37=100×2.37=237