一道小学数学六年级填空题

2025-03-15 02:04:22
推荐回答(4个)
回答1:

设长方体木条底面面积为a
则由条件可得长方体木条表面积为7a*4+2a=30a
所有正方体木块表面积的和为6a*7=42a
所有正方体木块表面积的和比原来长方体木条表面积增加(42a-30a)/30a%=40%

回答2:

切成7个,增加10个面(小)!

原长方形的表面积是2大加2小,大是小的7倍,设小为X
则:
原长方形表面积是(7+7+1+1)=16X,现为(16+10)=26X
剩下的自己算。我都算到这了,你还不知道,那你就没药救了!

回答3:

设原来长方体 长为7 宽和高为1
则原来长方体表面积为 (1*1+1*7+1*7)*2=30
每个小正方体表面积为 1*1*6=6
7个共为 42
则 (42-30)/30=40%

回答4:

1、一个环形,它的内圆半径是6cm,外圆半径是10cm,这个环形的面积是(200.96平方厘米)。
2、数a是数b的5\7,数a与数b的比是(5
):(7
),数b与数a的比是(7
):(5

3、妈妈买了24个橘子,20个苹果。《1》桔子个数与苹果个数的比是(
6):(5

《2》苹果个数与橘子个数的比是(5
):(
6)《3》橘子个数与妈妈卖水果总个数的比是(
6):(
11)《4》苹果个数与妈妈卖水果总个数的比是(
5):(11

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