Question

4.9x0.275+0.51x2.75简便计算？

Answer 1

可以使用分配律展开计算，得到:
4.9x0.275 + 0.51x2.75 = (4.9 x 0.25 + 4.9 x 0.025) + (0.5 x 2.75 + 0.01 x 2.75)
= (1.225 + 0.1225) + (1.375 + 0.0275)
= 1.3475 + 1.4025
= 2.75
因此，简便计算后答案为 2.75。

Answer 2

4.9x0.275+0.51x2.75
=0.49x2.75+0.51x2.75
=（0.49+0.51）x2.75
=1x2.75
=2.75

Answer 3

4.9*0.275+0.51*2.75
=0.49*2.75+0.51*2.75
=2.75（0.49+0.51）
=2.75
或者：
原式=4.9*0.275+5.1*0.275
=0.275*（4.9+5.1）
=2.75

Answer 4

4.9×0.275+0.51×2.75
=0.275×(4.9+5.1)
=0.275×10
=2.75

Answer 5

有图有真相，请看下图：