Question

6.43+2.79-2.85简便运算？

Answer 1

可以先用6.43+2.79将6.43改为6.22加0.21+2.79，等于6.22+3，然后用3先减2.85，6.22+0.15等于6.37。

Answer 2

从数字排列来看，此题并没有非常简单的简便运算，正常算即可
6.43+2.79-2.85
=9.22-2.85
=6.37

Answer 3

6.43+2.79-2.85
=6+0.43+2+0.79-2-0.85
=6+2-2+0.43+0.79-0.85
=6+0.4+0.03+0.7+0.09-0.8-0.05
=6+0.4+0.7-0.8+0.03+0.09-0.05
=6+0.3+0.07
=6.37

6.43+2.79-2.85=6.37

Answer 4

6.43+2.79-2.85
=9.22-2.85
=6.37

Answer 5

6.43-0.06+0.06+2.79-2.85

=6.43-0.06+2.85-2.85
=6.43-0.06
=6.37