题目内容
4.6+6.92+5.4=4.6+
(25+80)×4=4×
5.4
5.4
+6.92(25+80)×4=4×
25
25
+4×80
80
.分析:(1)根据减法的交换律、结合律进行简算,
(2)根据乘法的分配律进行简算即可.
(2)根据乘法的分配律进行简算即可.
解答:解:(1)4.6+6.92+5.4,
=4.6+5.4+6.92,
=(4.6+5.4)+6.92,
=10+6.92,
=16.92;
(2)(25+80)×4,
=4×25+4×80,
=100+320,
=420.
故答案为:5.4,25,80.
=4.6+5.4+6.92,
=(4.6+5.4)+6.92,
=10+6.92,
=16.92;
(2)(25+80)×4,
=4×25+4×80,
=100+320,
=420.
故答案为:5.4,25,80.
点评:此题考查了整数加法、乘法的运算定律的运用.
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