简算:4.4乘以57.8加45.3乘以5.6.
问题描述:
简算:4.4乘以57.8加45.3乘以5.6.
答
原式=4.4×45.3+4.4×12.5+45.3×5.6
=45.3×(4.4+5.6)+4.4×(10+2+0.5)
=453+44+8.8+2.2
=508