Question

1.4×25+3.5的简便方法计算怎么算？

Answer 1

递等式计算1.4×25+3.5过程解析
解题思路:四则运算规则(按顺序计算,先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行
解题过程:
1.4×25+3.5

=35+3.5

=38.5

扩展资料$竖式计算-计算过程:先将两乘数末位对齐,然后分别使用第二个乘数,由末位起对每一位数依次乘上一个乘数,最后将所计算结果累加即为乘积,如果乘数为小数可先将其扩大相应的倍数,最后乘积在缩小相应的倍数；
解题过程:
步骤一:5×14=70

步骤二:2×14=280

根据以上计算步骤组合结果为35

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Answer 2

1.4×25+3.5
=7×（0.2×25）+3.5
=7×5+3.5
=35+3.5
=38.5

Answer 3

1.4X25十3.5
=0.7X2X25十3.5
=0.7X50十3.5
=35十3.5
=38.5

Answer 4

1.4×25+3.5
=（1+0.4）×25+3.5
=1×25+0.4×25+3.5
=25+10+3.5
=35+3.5
=38.5

Answer 5

1.4×25+3.5
=(1+0.4)×25+3.5
=25×1+0.4×25+3.5
=25+10+3.5
=38.5