4.2x 4.2+0.42x 58
2个回答
4.2× 4.2+0.42×58
=0.42×42+0.42×58
=0.42×(42+58)
=0.42×100
=42
相关问题
4、简便运算 1,99x58+33x42 2,125x(4+5)x25 =
1.3.8x4.2+0.38x58
解方程.0.35x=7 x÷0.2=0.5 x+0.42=4.2 x-4.6=6.4.
解方程.0.35x=7 x÷0.2=0.5 x+0.42=4.2 x-4.6=6.4.
解方程.①5.4-X=1.2②0.6X=42③X÷2.4=0.5.
4{3[2(x-1)-2]-30} 58=4x
9.42-2.656+0.58-4.35的简便方法
Max 0.35x3 s.t.0.07x1+0.58x2-0.35x3》0 0.58x2-0.04x3-0.02x4》0
1/4- 2x = 58
7.6x( )+2.4x( )=58