《2025年多维互动提优课堂五年级数学上册提升版》

1. 直接写出得数。(6 分)
0.54＋0.46＝1
0.6＋0.35＝0.95
5－0.01＝4.99
1－0.3－0.7＝0
2－0.37＝1.63
5.62－0.52＝5.1

答案： 1. $0.54 + 0.46 = 1$
2. $0.6 + 0.35 = 0.95$
3. $5 - 0.01 = 4.99$
4. $1 - 0.3 - 0.7 = 0$
5. $2 - 0.37 = 1.63$
6. $5.62 - 0.52 = 5.1$

2. 笔算下面各题,带☆的要验算。(10 分)
15.2＋7.65＝22.85
☆8－3.65＝4.35
40.6－2.06＝38.54
☆8.38＋12.42＝20.8

答案： $15.2 + 7.65 = 22.85$
$☆8 - 3.65 = 4.35$
验算：$4.35 + 3.65 = 8$
$40.6 - 2.06 = 38.54$
$☆8.38 + 12.42 = 20.8$
验算：$20.8 - 12.42 = 8.38$

3. 计算下面各题,能简便计算的要简便计算。(12 分)
7.2＋2.78＋2.8
5.6＋3.27＋4.4＋6.73
35.67－5.24－5.67
14.6－3.45－(4.6＋6.55)

答案： 1.
7.2 + 2.78 + 2.8
= 7.2 + 2.8 + 2.78
= 10 + 2.78
= 12.78
2.
5.6 + 3.27 + 4.4 + 6.73
= (5.6 + 4.4) + (3.27 + 6.73)
= 10 + 10
= 20
3.
35.67 - 5.24 - 5.67
= 35.67 - 5.67 - 5.24
= 30 - 5.24
= 24.76
4.
14.6 - 3.45 - (4.6 + 6.55)
= 14.6 - 3.45 - 4.6 - 6.55
= (14.6 - 4.6) - (3.45 + 6.55)
= 10 - 10
= 0