简算:4.4×57.4+45.3×5.6=?
问题描述:
简算:4.4×57.4+45.3×5.6=?
答
4.4×57.4+45.3×5.6
=4.4×57.4+57.4×5.6-12.1×5.6
=(4.4+5.6)×57.4-67.76
=10×57.4-70+2.24
=574-70+2.24
=506.24