2.9×0.45+0.29x4.2+0.029x13简便计算
2.9×0.45+0.29×4.52+0.029×13的简便运算如下,2.9×0.45+0.29×4.2+0.029×13=0.29×4.5+0.29×4.2+0.29×1.3=(4.5+4.2+1.3)×2.9=1...
2.9×0.45+0.29×4.52+0.029×13的简便运算如下,2.9×0.45+0.29×4.2+0.029×13=0.29×4.5+0.29×4.2+0.29×1.3=(4.5+4.2+1.3)×2.9=1...