Question

6.7x4.9+51×0.67简便计算

Answer 1

根据题意，这道题的简便计算方法是，原式等于0.67×10×4.9+51×0.67=0.67×49+0.67×51=0.67×（49+51）=0.67×100=67

Answer 2

6.7x4.9+51×0.67
=6.7x4.9+5.1×6.7
=6.7x（4.9+5.1）
=6.7x10
=67