Question

2.8乘0.45加0.28乘4.8加0.028乘0.36简便计算？

Answer 1

2.8×0.45+0.28×4.8+0.028×0.36
=0.028x0.45x100+0.028×10x4.8+0.028x 0.36
=0.028×（45+48+0.36）
=0.028×（93+0.36）
=0.028x（100-7+0.36）
=0.028×（100-6.64）
=2.8-0.18592
=2.61408

Answer 2

2.8×0.45+0.28×4.8+0.028×0.36
=2.8×0.45+2.8×0.48+2.8×36
=2.8×（0.45+0.48+36）
=2.8×36.93
=（3－0.2）×36.93
=3×36.93－0.2×36.93
= 110 .79－7.386
=103.404

Answer 3

根据“2.8乘0.45加0.28乘4.8加0.028乘0.36”列式：
2.8×0.45+0.28×4.8+0.028×0.36
=1.26+1.344+0.01008
=2.61408

追问

简便计算？

追答

简便计算：2.8×0.45+0.28×4.8+0.028×0.36
=2.8(0.45+0.48+0.0036)
=2.8(0.93+0.0036)
=2.8×0.9336
=2.61408