Question

3.4×2.5×1.8的简便计算？

Answer 1

原式=3.4×5×0.5×1.8
=17×1/2×1.8
=17×0.9
=10×0.9+7×0.9
=9+6.3=15.3

Answer 2

3.4×2.5×1.8简便运算：
3.4×2.5×1.8
=1.7×2×2.5×2×0.9
=1.7×0.9×(2.5×4)
=1.53×10
=15.3

Answer 3

3.4×2.5×1.8的简便计算？
3.4x2.5x1.8
=3.4x2.5x0.2x9
=3.4x(2.5x0.2)x9
=3.4x0.5x9
=(3.4x0.5)x9
=1.7x9
=1.7x(10-1)
=1.7x10-1.7x1
=17-1.7
=15.3
简单的数学运算

Answer 4

3.4×2.5×1.8
=(3.4÷2)×(2.5×4)×(1.8÷2)
=1.7×10×0.9
=17×(1-0.1)
=17×1-17×0.1
=17-1.7
=17-(2-0.3)
=17-2+0.3
=15+0.3
=15.3

Answer 5

首先观察一下这个运算。只有乘法，按先后顺序从左往右相乘。3.4可以分解为3+0.4，1.8可以分解为2-0.2，然后按顺序进行相乘就可以了。
3.4×2.5×1.8=
（3+0.4）×2.5×（2-0.2）=
（3×2.5+0.4×2.5）×（2-0.2）=
（7.5+1）×（2-0.2）=
8.5×（2-0.2）=
8.5×2-8.5×0.2=
17-1.7=15.3