《2025年同步练习册青岛出版社四年级数学上册青岛版淄博专版五四制》

4. 判断。(对的打“√”,错的打“×”并改正。)

× 改正：$\begin{array}{r}7.80 \\-2.58 \\\hline5.22 \\\end{array}$
× 改正：$\begin{array}{r}8.32 \\ +6.30 \\\hline14.62 \\\end{array}$
× 改正：$\begin{array}{r}3.70 \\ +7.43 \\\hline11.13 \\\end{array}$
√

答案： × 改正：$\begin{array}{r}7.80 \\-2.58 \\\hline5.22 \\\end{array}$
× 改正：$\begin{array}{r}8.32 \\ +6.30 \\\hline14.62 \\\end{array}$
× 改正：$\begin{array}{r}3.70 \\ +7.43 \\\hline11.13 \\\end{array}$
√

5. 买水果。

(1)买香蕉和苹果一共花了多少元？
(2)买桃子比买苹果多花了多少元？

答案：
(1)17.65+10.35=28(元)
(2)21.75-10.35=11.4(元)

6. 直接写得数。
0.37 + 0.17 = 0.54
1.2 + 8.8 = 10
0.8 - 0.5 = 0.3
0.65 + 35 = 35.65
4.3 - 4.3 = 0
12.95 - 12 = 0.95
7.11 + 8 = 15.11
0.24 + 0.36 = 0.6
6.07 + 1.9 = 7.97
1.2 - 0.3 = 0.9
4.8 - 0.7 = 4.1
1.6 - 0.9 = 0.7
0.03 + 0.77 = 0.8
2.06 - 1.85 = 0.21
10.22 - 8.19 = 2.03

答案： 0.37 + 0.17 = 0.54
1.2 + 8.8 = 10
0.8 - 0.5 = 0.3
0.65 + 35 = 35.65
4.3 - 4.3 = 0
12.95 - 12 = 0.95
7.11 + 8 = 15.11
0.24 + 0.36 = 0.6
6.07 + 1.9 = 7.97
1.2 - 0.3 = 0.9
4.8 - 0.7 = 4.1
1.6 - 0.9 = 0.7
0.03 + 0.77 = 0.8
2.06 - 1.85 = 0.21
10.22 - 8.19 = 2.03