2.3X3.5+0.23X42+0.23X23
=2.3x3.5+2.3x4.2+2.3x2.3
=2.3x(3.5+4.2+2.3)
=2.3x10
=23
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2.3X3.5+0.23X42+0.23X23
=0.23X35+0.23X42+0.23X23
=0.23x(35+42+23)
=0.23x100
=23
=0.23×10×3.5+0.23×42+0.23×23
=0.23×(35+42+23)
=0.23×100
=23
2.3×3.5+0.23×42+0.23×23
=0.23×10×3.5+0.23×42+0.23×23
=0.23×(3.5×10)+0.23×42+0.23×23
=0.23×(35+42+23)
=0.23×100
=23