29.4×5.1×2.3简便运算
问题描述:
29.4×5.1×2.3简便运算
答
29.4×5.1×2.3
=3×9.8×5.1×2.3
=9.8×6.9×5.1
=(10-0.2)×6.9×5.1
=(69-1.38)×5.1
=67.62×(5+0.1)
=338.1+6.762
=344.862