问题 解答题
怎样算简便就怎样算.
24×
51
43
+51×
62
43
0.25×(1.6+1.6+1.6+1.6)
7
9
÷
11
5
+
2
9
×
5
11
0.125×32×2.5.
答案

(1)24×

51
43
+51×
62
43

=24×

51
43
+62×
51
43

=(24+62)×

51
43

=86×

51
43

=102;

(2)0.25×(1.6+1.6+1.6+1.6),

=0.25×4×1.6,

=1×1.6,

=1.6;

(3)

7
9
÷
11
5
+
2
9
×
5
11

=

7
9
×
5
11
+
2
9
×
5
11

=(

7
9
+
2
9
)×
5
11

=1×

5
11

=

5
11

(4)0.125×32×2.5,

=0.125×8×4×2.5,

=(0.125×8)×(4×2.5),

=1×10,

=10.

单项选择题
名词解释