2025年小学同步练习册四年级数学上册青岛版54制青岛出版社第78页答案
1. 口算。
10.7+1.9 =
12.6

3.9+0.6 =
4.5

0.7+0.8 =
1.5

8+0.06 =
8.06

6.94+0.04 =
6.98

7+0.7 =
7.7

4.5+2.7 =
7.2

2.6+4 =
6.6

答案

12.6
4.5
1.5
8.06
6.98
7.7
7.2
6.6
2. 用竖式计算。（带“※”的要验算。）
1.48+3.64 =
$\begin{array}{r r} &1.48 \\ + &3.64 \\ \hline &5.12\end{array}$

※22.32+12.59 =
$\begin{array}{r r} &22.32 \\ + &12.59 \\ \hline &34.91\end{array}$

验算：
$\begin{array}{r r} &34.91 \\ - &12.59 \\ \hline &22.32\end{array}$

40.5+39.57 =
$\begin{array}{r r} &40.50 \\ + &39.57 \\ \hline &80.07\end{array}$

26.75+2.83 =
$\begin{array}{r r} &26.75 \\ + &2.83 \\ \hline &29.58\end{array}$

※52.6-24.8 =
$\begin{array}{r r} &52.6 \\ - &24.8 \\ \hline &27.8\end{array}$

验算：
$\begin{array}{r r} &27.8 \\ + &24.8 \\ \hline &52.6\end{array}$

20-3.65 =
$\begin{array}{r r} &20.00 \\ - &3.65 \\ \hline &16.35\end{array}$

答案

1.
$1.48+3.64 =5.12$
$\begin{array}{r r} &1.48 \\ + &3.64 \\ \hline &5.12\end{array}$
2.
$22.32+12.59 =34.91$
$\begin{array}{r r} &22.32 \\ + &12.59 \\ \hline &34.91\end{array}$
验算：$34.91 - 12.59 = 22.32$
$\begin{array}{r r} &34.91 \\ &12.59 \\ \hline &22.32\end{array}$
3.
$40.5+39.57 =80.07$
$\begin{array}{r r} &40.50 \\ + &39.57 \\ \hline &80.07\end{array}$
4.
$26.75+2.83 =29.58$
$\begin{array}{r r} &26.75 \\ + &2.83 \\ \hline &29.58\end{array}$
5.
$52.6-24.8 =27.8$
$\begin{array}{r r} &52.6 \\ &24.8 \\ \hline &27.8\end{array}$
验算：$27.8+24.8 = 52.6$
$\begin{array}{r r} &27.8 \\ + &24.8 \\ \hline &52.6\end{array}$
6.
$20-3.65 =16.35$
$\begin{array}{r r} &20.00 \\ &3.65 \\ \hline &16.35\end{array}$