作业帮简便计算 (1)8.23-(4.56-1.77)-1.34 (2)(3*0.5/3*0.5)*(2-1.8+0.2)(3)1.05*(3.8-0.8)/6.3 (3)1+1/3-7/12+9/20-11/30+13/42-15/56
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 19:53:32
简便计算 (1)8.23-(4.56-1.77)-1.34 (2)(3*0.5/3*0.5)*(2-1.8+0.2)(3)1.05*(3.8-0.8)/6.3 (3)1+1/3-7/12+9/20-11/30+13/42-15/56
简便计算
(1)8.23-(4.56-1.77)-1.34 (2)(3*0.5/3*0.5)*(2-1.8+0.2)
(3)1.05*(3.8-0.8)/6.3 (3)1+1/3-7/12+9/20-11/30+13/42-15/56
简便计算 (1)8.23-(4.56-1.77)-1.34 (2)(3*0.5/3*0.5)*(2-1.8+0.2)(3)1.05*(3.8-0.8)/6.3 (3)1+1/3-7/12+9/20-11/30+13/42-15/56
（1）8.23-（4.56-1.77）-1.34
=8.23-4.56+1.77-1.34
=（8.23+1.77）-(4.56+1.34)
=10-6
=4
(2)(3*0.5/3*0.5)*(2-1.8+0.2)
=(3/3*0.5*0.5)*0.4
=0.25*0.4
=0.1
(1):8.23-(4.56-1.77)-1.34=(8.23+1.77)-(4.56+1.34)=10-6=4;(2):(3*0.5/3*0.5)*(2-1.8+0.2)=(3/3*0.5*0.5)*(0.2+0.2)=0.25*0.4=0.1;(3):1.05*(3.8-0.8)/6.3=1.05*3/(3*2*1.05)=1/2=0.5;(4):1+1/3-7/12+9/20-11/30+1...
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(1):8.23-(4.56-1.77)-1.34=(8.23+1.77)-(4.56+1.34)=10-6=4;(2):(3*0.5/3*0.5)*(2-1.8+0.2)=(3/3*0.5*0.5)*(0.2+0.2)=0.25*0.4=0.1;(3):1.05*(3.8-0.8)/6.3=1.05*3/(3*2*1.05)=1/2=0.5;(4):1+1/3-7/12+9/20-11/30+13/42-15/42=(1+3)/(1*3)-(3+4)/(3*4)+(4+5)/(4*5)-(5+6)/(5*6)+(6+7)/(6*7)-(7+8)/(7*8)=(1+1/3)-(1/3+1/4)+(1/4+1/5)-(1/5+1/6)+(1/6+1/7)-(1/7+1/8)=1-1/8=7/8.
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