Question

3.21x8.2x+87x0.18+0.82x54.9简便运算

Answer 1

解:
原式
=
3.21
x
8.2
+
87
x
0.18
+
8.2
x
5.49,

=
8.2
x
(3.21+5.49)
+
87
x
0.18,

=
8.2
x
8.7
+
8.7
x1.8,

=
8.7
x
(8.2+1.8)
=
8.7x10

=
87.
答案正确，请采纳，下次还可帮助你哟。