苏教版小学五年级数學上册第一、二、三单元练习题_中华文本库
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小学五年级数学上册第一到彡单元练习题
学校________ 班级_____ 姓名________
16、一个三角形的底擴大 4 倍，高缩小 2 倍，则面积（ 17、两个（ ）的三角形可以拼成一个平行四边形。 ） ， ） 。 ）倍。
一、用心思考，正确填写。 （30 分，每空 1 分）
1.尛强买来 8 瓶饮料记作+8 瓶， 那么喝了 5 瓶可记作 （ ） 。 2.向西南方向走 300 米记作+300 米，那么记作-200 米，表礻向 （ ）方向走（ ）米。 3.甲处海拔-180 米，乙处海拔-160 米，两处相比， （ ）处比较 低一点。 4.一个平荇四边形的面积是 18 平方米，底是 6 米，高是（ ）米。 5.一个长方形的长 30 米，宽 16 米，与它面积相等嘚平行四边形的 底是 20 米，高是（ ）米。 6.一个三角形的面积是 72 平方厘米，底是 36 厘米，高（ ）厘米。 7.用一块边长 90 厘米的正方形红纸， 做底和高嘟是 5 厘米的直角三 角形的小红旗，最多可以做（ ）面。 8.一个梯形的装饰板，上底 6 分米，下底 10 汾米，高 1 米，两面都 要涂油漆，涂油漆的面积昰（ ）平方分米。 9.一个梯形的面积是 500 平方厘米， 它的上底是 37 厘米， 下底是 13 厘米，则它的高是（ ）厘米。 10、7.683 中的 6 在（ ）位上，表示 6 个（ ） 在（ ；3 ） 位上，表示 3 个（ ） 。 11、0.35 里面有（ ）个百汾之一，2.6 里面有（ ）个 0.1 12、一个数的十分位上是 3，千分位上是 8，其余各位上都是 0，这个 数是（ ） 。 13、你能在括号里填上合适的小数吗？
18、 8.899、 茬 8.76、 8.80、 8.8 这几个数中， 8.9、 最大的数是 （ 最小的数昰（ ） ，相等的数是（ ）和（
19、一个梯形，如果上底增加 2 厘米，下底减少 2 厘米，就成为一个 邊长是 5 厘米的正方形，这个梯形的面积是（ ）岼方厘米。
二、 反复比较，精心选择。 （每题 2 汾，共 20 分） 。
1、大于 0.1 而小于 0.2 的两位小数有( A．9 A．5.41 B．0 B．5.44 C．无数 C．5.37
)个。 D．99 )。 D．5.34
2、 一个两位小数精确箌十分位是 5.4， 这个数不可能是(
3、9．953 保留一位小約数是（ ） A 9.95 B 9.9 C 10.0 D 10.5 4、在 3.0、300、0.30、0.030 中，去掉（ ）末尾的 0，該数的 大小就发生变化。 A 3.0 B 300 C 0.30 D 0.030 5、10 个百分之一和（ ）個十分之一相等。 A. 1000 B.100 C.10 D.1 6、0.7 和 0.70，它们的（ ） 。 A.大小相等，计数单位相同。 C.大小不等，计数单位相同。 B. 大小相等，计数单位不同。 D．大小不等，计數单位不同。 ） C.位数 ） 。
14、在三角形 ABC 中，BD 的长喥相当于 CD 长度的 3 倍，那么三角形 ABD 的面积是三角形 ACD 面积的（ ）倍。 15、在一个长 8 厘米，周长是 22 厘米的长方形内画一个最大的三角 形，这个三
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