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2025年好卷四年级数学下册北京课改版
注：目前有些书本章节名称可能整理的还不是很完善，但都是按照顺序排列的，请同学们按照顺序仔细查找。练习册 2025年好卷四年级数学下册北京课改版 答案主要是用来给同学们做完题方便对答案用的，请勿直接抄袭。
1. 口算。（6分）
9.3 - 3 = 0.32 + 6.8 = 8.5 - 3.5 =
5.18 + 3.02 = 3.3÷100 = 1.4×1000 =
12 - 5.7 = 19.9 + 8.1 = 18.9 - (4.7 + 5.3) =
17 - 3.6 - 6.4 = 6.92 - 3.08 = 3.56 + 0.72 =
9.3 - 3 = 0.32 + 6.8 = 8.5 - 3.5 =
5.18 + 3.02 = 3.3÷100 = 1.4×1000 =
12 - 5.7 = 19.9 + 8.1 = 18.9 - (4.7 + 5.3) =
17 - 3.6 - 6.4 = 6.92 - 3.08 = 3.56 + 0.72 =
答案：
1. 6.3 7.12 5 8.2 0.033 1400 6.3 28 8.9 7 3.84 4.28
2. 用竖式计算。（9分）
15.06 - 9.48 = 21 - 3.24 = 5.007 + 50.702 =
15.06 - 9.48 = 21 - 3.24 = 5.007 + 50.702 =
答案：
2. 15.06 - 9.48 = 5.58
1 5. 0 6\n9. 4 8
5. 5 8
21 - 3.24 = 17.76
2 1. 0 0\n3. 2 4
1 7. 7 6
5.007 + 50.702 = 55.709
5. 0 0 7
+ 5 0. 7 0 2
5 5. 7 0 9
1 5. 0 6\n9. 4 8
5. 5 8
21 - 3.24 = 17.76
2 1. 0 0\n3. 2 4
1 7. 7 6
5.007 + 50.702 = 55.709
5. 0 0 7
+ 5 0. 7 0 2
5 5. 7 0 9
3. 脱式计算。（16分）
8.91 + 1.7 + 2.09 + 4.3 29 - 6.74 - 4.26
19.36 + 9.2 - 9.36 14.76 -(4.76 - 2.5)
8.91 + 1.7 + 2.09 + 4.3 29 - 6.74 - 4.26
19.36 + 9.2 - 9.36 14.76 -(4.76 - 2.5)
答案：
3. 8.91 + 1.7 + 2.09 + 4.3
= (8.91 + 2.09) + (1.7 + 4.3)
= 11 + 6
= 17
29 - 6.74 - 4.26
= 29 - (6.74 + 4.26)
= 29 - 11
= 18
19.36 + 9.2 - 9.36
= 19.36 - 9.36 + 9.2
= 10 + 9.2
= 19.2
14.76 - (4.76 - 2.5)
= 14.76 - 4.76 + 2.5
= 10 + 2.5
= 12.5
= (8.91 + 2.09) + (1.7 + 4.3)
= 11 + 6
= 17
29 - 6.74 - 4.26
= 29 - (6.74 + 4.26)
= 29 - 11
= 18
19.36 + 9.2 - 9.36
= 19.36 - 9.36 + 9.2
= 10 + 9.2
= 19.2
14.76 - (4.76 - 2.5)
= 14.76 - 4.76 + 2.5
= 10 + 2.5
= 12.5
1. 如图，经过A点画出BC边的平行线，经过B点画出AC边的垂线。(6分)
答案：
1.
1.
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