Question

0.8x(12.5-4)怎样算？

Answer 1

简算0.8×(12.5-4)
解题思路:不能进行简便运算的按顺序计算,简便运算核心是运用加法和乘法各种定律进行计算,计算出整数部分方便后续计算的过程

解题过程:
0.8×(12.5-4)

=0.8×12.5-0.8×4

=10-3.2

=6.8

存疑请追问,满意请采纳

Answer 2

0.8x（12.5-4）=0.8x12.5-0.8x4
=10-3.2=6.8

Answer 3

解析：本题可用乘法分配律简便计算。
则依题意可得，
0.8×(12.5-4)
=0.8×12.5-0.8×4
=10-3.2
＝10-3-0.2
＝7-0.2
=6.8

Answer 4

0.8x(12.5-4)
=0.8x8.5
=0.8x(8+0.5)
=0.8x8+0.8x0.5
=6.4+0.4
=6.8

Answer 5

解:0.8×(12.5-4)
=0.8×12.5-0.8×4
=10-3.2
=6.8