Question

4.78×2.6

能简算的要简算．
4.78×0.6×0.5                     
9.85×101
0.25×1.25×8×4                  
4.3×2.6+5.7×2.6．

Answer 1

①4.78×0.6×0.5 
=4.78×（0.6×0.5）
=4.78×0.3
=1.434；
                    
②9.85×101
=9.85×（100+1）
=9.85×100+9.85×1
=985+9.85
=994.85；

③0.25×1.25×8×4    
=（0.25×4）×（1.25×8）
=1×10
=10；
              
④4.3×2.6+5.7×2.6
=（4.3+5.7）×2.6
=10×2.6
=26．