初中数学计算3厂18+1/5厂50-4厂1/29厂1/20÷3/2厂3/5×1/2厂2/2/3(2又2分之3)要过程要清楚告诉我为什么加分
2019-04-14
初中数学计算
3厂18+1/5厂50-4厂1/2
9厂1/20÷3/2厂3/5×1/2厂2/2/3(2又2分之3)
要过程要清楚告诉我为什么加分
优质解答
3厂18+1/5厂50-4厂1/2
=3*3√2+1/5*5√2-4*√2/2
=9√2+√2-2√2
=8√2.
9厂1/20÷3/2厂3/5×1/2厂2/2/3
=9÷3×1/2*√(1/20÷3/5×8/3)
=3/2*√(2/9)
=3/2*1/3*√2
=√2/2.
3厂18+1/5厂50-4厂1/2
=3*3√2+1/5*5√2-4*√2/2
=9√2+√2-2√2
=8√2.
9厂1/20÷3/2厂3/5×1/2厂2/2/3
=9÷3×1/2*√(1/20÷3/5×8/3)
=3/2*√(2/9)
=3/2*1/3*√2
=√2/2.