0.1+0.2+0.3+...+0.8+0.9+0.10+0.11+0.12+...+0.19+0.20 要简便怎么算才正确快呀,急.
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0.1+0.2+0.3+...+0.8+0.9+0.10+0.11+0.12+...+0.19+0.20 要简便怎么算才正确快呀,急.
0.1+0.2+0.3+...+0.8+0.9+0.10+0.11+0.12+...+0.19+0.20 要简便怎么算才正确
快呀,急.
0.1+0.2+0.3+...+0.8+0.9+0.10+0.11+0.12+...+0.19+0.20 要简便怎么算才正确快呀,急.
0.1到0.9共9个数,0.10到0.20是11个数,分别求和再相加.
(0.1+0.9)×9÷2=4.5
(0.10+0.20)×11÷2=1.65
原式=4.5+1.65=6.15
(0.1+0.9)*9/2 +(0.10+0.20)*11/2 =6.15
0.1-0.9一共9个,0.10-0.20一共10个
0.1+0.2+0.3+...+0.8+0.9+0.10+0.11+0.12+...+0.19+0.20
=(0.1+0.9)+(0.2+0.8)+…+0.5+(0.10+0.20)+(0.11+0.19)+…(0.15+0.16)
=4*1+0.5+5*0.3
=4+2
=6
简算.0.1+0.2+0.3+.+0.8+0.9+1
(0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.9)除以(0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2)
(0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.9)除以(0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2)
巧算:0.1+0.2+0.3+0.4+0.5+0.6+0.7+0.8+0.9
找规律0.1、0.2、0.3、0.5、0.8()()()
0.1+0.2+0.3+...+0.8+0.9+0.12+0.14+0.16+...+0.88
0.1 0.2 0.3 0.5 0.8 @ 2.1 .找规律,则@是多少
0.1×0.2×0.4+0.2×0.4×0.8+0.3×0.6×1.2)分之(0.1×0.3×0.9+0.2×0.6×0.8+0.3×0.9×2.7)
(0.1×0.2×0.4+0.2×0.4×0.8+0.3×0.6×1.2)分之(0.1×0.3×0.9+0.2×0.6×0.8+0.3×0.9×2.7)=
解方程.0.1X+0.3X+0.8分之0.2+0.3X=80.1X+0.3X+0.8分之0.2+0.3X=80.1X+0.3X都是分子
MATLAB仿真出现错误,A=[-1 0.8 -2.4;3.8 0.1 -0.8;0.1 2.5 -1];AD=[0.2 0.1 0.1;-0.3 0.1 0.2;0.2 0.3 -0.3];B=[1 2.2;2.7 3.5;2 -0.2];E=[0.3 0.1 0.1;0.1 0.3 0.2];ED=[0.1 0.1 0.2;0.1 0.2 0.1];Delta=[0.5 0.6;-0.4 0.2];G=[-0.2 -0.1;0.35 0.2;-0.15 -0.1];N
解方程0.1X+0.3X+0.8分之0.2+0.3X=8
简算:0.1×0.2×0.4×+0.2×0.4×0.8+0.3×0.6×1.2分之0.1×0.3×0.9×+0.2×0.6×1.8+0.3×0.9×2.7=
0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2分之0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7的解法并说出为什么这样写
0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
0.1*0.2*0.3*0.4*0.5*0.6*0.7*0.8*0.9用简便的方法怎么做
简便计算0.1+0.2十0.3+0.4十0.5+0.6+0.7+0.8+0.9的值
0.1+0.2+0.3+...+0.8+0.9+0.12+0.14+0.16+...+0.88 =等于多少,