Question

2.1×2.6+7.4×5.4+2.6×3.3这道题怎样简算

Answer 1

2.1×2.6+7.4×5.4+2.6×3.3
=2.1×2.6+2.6×3.3+7.4×5.4
=（2.1+3.3）×2.6+7.4×5.4
=5.4×2.6+7.4×5.4
=5.4×（7.4+2.6）
=5.4×10
=54

Answer 2

2.1×2.6+7.4×5.4+2.6×3.3
=（2.1+3.3）×2.6+7.4×5.4
=5.4×2.6+7.4×5.4
=5.4×（2.6+7.4）
=5.4×10
= 54

Answer 3

根据精心的计算