作业帮4.4×57.8+45.3×5.6简便运算
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/02 19:30:09
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4.4×57.8+45.3×5.6简便运算
4.4×57.8+45.3×5.6
简便运算
4.4×57.8+45.3×5.6简便运算
=4.4×(45.3+12.5)+45.3×5.6
=4.4×45.3+4.4×12.5+45.3×5.6
=45.3×(4.4+5.6)+11×0.4×2.5×5
=453+55
=508
=4.4×(45.3+12.5)+45.3×5.6
=4.4×45.3+4.4×12.5+45.3×5.6
=45.3×(4.4+5.6)+11×0.4×2.5×5
=453+55
=508
原式＝(10-5.6)×57.8+45.3×5.6
＝578-5.6×57.8+5.6×45.3
＝578-5.6×（57.8-45.3）
＝578-5.6×12.5
＝578-5.6×（100/8）
＝578-560/8
＝578-70
＝508