Question

3.45✘0.45+0.5✘3.45+0.95✘6.55简便方法？

Answer 1

巧算3.45×0.45+0.5×3.45+0.95×6.55
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:
3.45×0.45+0.5×3.45+0.95×6.55

=3.45×(0.45+0.5)+0.95×6.55

=3.45×0.95+0.95×6.55

=(3.45+6.55)×0.95

=10×0.95

=9.5

扩展资料-竖式计算-计算过程:两个加数的个位对齐,再分别在相同计数单位上的数相加,相加结果满10则向高位进1,高位相加需要累加低位进1的结果。
解题过程:
步骤一:0.45+0.55=0.0 向高位进1 小数部分加法计算

步骤二:3+6+1=0 向高位进1

根据以上计算步骤组合计算结果为10

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Answer 2

方法一:
3.45×0.45+0.5×3.45+0.95×6.55
=3.45×(0.45+0.5)+0.95×6.55
=3.45×0.95+0.95×6.55
=(3.45+6.55)×0.95
=10×0.95
=9.5

方法二:
3.45×0.45+0.5×3.45+0.95×6.55
=(0.5－0.05)×3.45+0.5×3.45
+(1－0.05)×6.55
=0.5×3.45－0.05×3.45+0.5×3.45
+1×6.55－0.05×6.55
=0.5×3.45×2－0.05×3.45+6.55
－0.05×6.55
=3.45－0.05×3.45+6.55－0.05×6.55
=3.45－0.1725+6.55－0.3275
=(3.45+6.55)－(0.1725+0.3275)
=10－0.5
=9.5

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Answer 3

解析：本题可用乘法分配律简便计算。则依题意可得，

3.45×0.45+0.5×3.45+0.95×6.55

=3.45×（0.45+0.5）+0.95×6.55

=3.45×0.95+0.95×6.55

=0.95×（3.45+6.55）

=0.95×10

=9.5

Answer 4

3.45×0.45+0.5×3.45+0.95×6.55
=3.45×(0.45+0.5)+0.95×6.55
=3.45×0.95+0.95×6.55
=0.95×(3.45+6.55)
=0.95×10
=9.5
备注：本题用了两次乘法分配律。

Answer 5

3.45×0.45+0.5×3.45+0.95×6.55简便计算？
解：原式=3.45×（0.45+0.5）+0.95×6.55
=3.45×0.95+0.95×6.55
=0.95×（3.45+6.55）
=0.95×10
=9.5