题目内容

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.
(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.
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