1.25×98+12
1
2
×
1
10
+1
1
4
=
125
125
分析:1.25×98+12
1
2
×
1
10
+1
1
4
,首先把分數(shù)化成小數(shù),1.25×98+12.5×0.1+1.25,再根據(jù)積的變化規(guī)律,轉(zhuǎn)化為:1.25×98+1.25×1+1.25,然后運用乘法分配律進行簡算.
解答:解:1.25×98+12
1
2
×
1
10
+1
1
4

=1.25×98+12.5×0.1+1.25,
=1.25×98+1.25×1+1.25,
=1.25×(98+1+1),
=1.25×100,
=125;
故答案為:125.
點評:解答此題首先把分數(shù)化成小數(shù),再根據(jù)積的變化規(guī)律將原式轉(zhuǎn)化為:1.25×98+1.25×1+1.25,然后運用乘法分配律進行簡算.
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