内容正文:
第 六 单 元 多边形的面积
53
3. 梯形的面积(一)
根据已知条件求出梯形的面积。(单位:厘米)
1 a = 10 b = 10 h = 10 S =
2 a = 1.5 b = 5.5 h = 8 S =
3 a = 0.1 b = 0.9 h = 2.2 S =
4 a = 15 b = 35 h = 40 S =
5 a = 0.2 b = 0.4 h = 0.2 S =
6 a = 40 b = 80 h = 0.75 S =
7 a = 1.4 b = 2.2 h = 0.8 S =
8 a = 10 b = 90 h = 100 S =
9 a = 0.8 b = 2.2 h = 2.9 S =
五年级数学上册口 算 天 天 练
54
3. 梯形的面积(二)
根据已知条件求出梯形的面积。(单位:分米)
1 a = 5 b = 15 h = 5 S =
2 a = 4 b = 8 h = 4 S =
3 a = 0.3 b = 0.7 h = 2.8 S =
4 a = 1.2 b = 7.2 h = 0.8 S =
5 a = 30 b = 50 h = 80 S =
6 a = 0.8 b = 2.8 h = 0.4 S =
7 a = 2.1 b = 3.3 h = 4.8 S =
8 a = 10 b = 12 h = 22 S =
9 a = 0.4 b = 0.6 h = 0.1 S =
参 考 答 案
67
⑩ 10y 11 9.3x 12 4.5+3b
13 3a 14 0.55a 15 10.5x
16 c 17 1.72b 18 12t
19 0.5s 20 43.62y 21 0.5m
22 7x 23 14.5x 24 2.6a
25 2.5b 26 7.3a 27 8.3c
2. 解简易方程
方程的意义(一)
画“√”有: ① ② ③ ⑨ ⑩ 11 12 15
16
方程的意义(二)
画“√”有: ① ③ ⑤ ⑦ ⑨ ⑩ 12 13
14 15 16 18
等式的性质(一)
一、① 2.8 ② c ③ d ④ 20
二、① - 8 ② ÷ 3 ③ - 27
④ + 64 + 64 ⑤ × 8 ⑥ - 38
等式的性质(二)
① + 3 ② ÷ 3 ③ - 4
④ × 9.8 ⑤ ÷ 5 ⑥ ÷3.2
⑦ - 32 ⑧ × 3 ⑨ + 9.87
解方程(一)
① 25 ② 12 ③ 50
④ 154.3 ⑤ 56 ⑥ 280
⑦ 1.5 ⑧ 121.2 ⑨ 18
⑩ 95 11 36 12 24
13 3 14 37.1 15 90
16 100 17 5.6 18 88.5
解方程(二)
① 16 ② 102.5 ③ 16
④ 5.07 ⑤ 56 ⑥ 3
⑦ 10 ⑧ 125.7 ⑨ 4.4
⑩ 1 11 54 12 12.2
13 10 14 140 15 72
16 56 17 4.5 18 221
实际问题与方程(一)
① 44 ② 7.85 ③ 7.2
④ 4 ⑤ 1.2 ⑥ 0.03
⑦ 0.2 ⑧ 10.5 ⑨ 5.8
⑩ 3.2 11 0.2 12 6.2
13 4.8 14 4.32 15 3.04
16 6.79 17 1.38 18 16.1
实际问题与方程(二)
① 3.5 ② 18 ③ 8
④ 3 ⑤ 5 ⑥ 17
⑦ 1 ⑧ 10 ⑨ 19.8
⑩ 1 11 24.3 12 4
13 2.21 14 5 15 4
16 1 17 2.1 18 2
实际问题与方程(三)
① 18 ② 8.4 ③ 2.8
④ 50 ⑤ 2.9 ⑥ 1
⑦ 31.8 ⑧ 26.2 ⑨ 5.001
⑩ 6 11 126 12 5.9
13 9.5 14 1.4 15 42
16 6.75 17 6.5 18