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8.5 5.61x2.3怎样简算?

2.2×0.7+0.56 =1.54+0.56 =2.1

=(3.2+5.6+1.2)x0.5=5

(1)=8.69(30×0.3-1.1×0.3)=8.69(9-3.3)= 8.69-5.7=1.99 (2)=4×5.6-0.3×5.6+7.43=22.4-1.68+7.73=22.4-2+0.32+7.73=20.4+8.05=28.45 (3)=43.2-(6.3+3.7) =43.2-10=33.2 (4)=(5.46+14.54)+ (2.81-0.61)=20+2.2 =22.2 (5)=1/8×...

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5.6x2.3=12.88

目前不能确定胎儿的性别,孕囊本身就是不规则的球形的,从不同的角度去看,形状是不一样的,所谓的形状和性别有关系是毫无医学依据的。 一般是怀孕四个月左右做超声检查可以看到胎儿的性别发育。

15.64-5.6-2.33+3.36怎么简算 =(15.64+3.36)-(5.6+2.33) =19-7.93 =11.07

8.8x1.25 =8*1.25+0.8*1.25 =10+1 =11 4.4+5.6x3 =4.4+5.6+5.6*2 =10+11.2 =21.2 1+2+3+……+20 =(1+20)*20/2 =210

8*(x+1/5)=3.2 x+0.2=3.2/8 x+0.2=0.4 x=0.4-0.2 x=0.2 y-1/5y=5.6 4/5y=5.6 0.8y=5.6 y=5.6/0.8 y=7 3/5*(x-50%)=1/10 x-50%=1/10 X 5/3 x-1/2=1/6 x=1/6+1/2 x=1/6+3/6 x=4/6 x=2/3 30%*-3/5=12/5 (这题是3/10x-3/5=12/5吗)我理解的 3/10...

3(x十1.2)=20.4 x+1.2=20.4/3 x+1.2=6.8 x=6.8-1.2 x=5.6

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