《2025年口算训练二年级数学下册北师大版升级版》

8100 - 6200 =
60 + 560 =
1100 - 600 =
40 + 120 =
4400 - 4200 =
20 + 720 =
6800 + 1400 =
600 + 900 =
230 + 288 =
340 - 10 =
4900 - 2600 =
90 + 130 =
9000 + 10 =

答案：

9600 - 6400 =
5900 + 300 =
3300 - 500 =
9200 - 800 =
805 + 700 =
9800 - 4600 =
600 + 5900 =
1600 - 700 =
960 - 940 =
7300 - 200 =
7000 + 300 =
7700 - 4300 =
5700 - 5500 =

答案：

2000 + 3700 =
60 + 70 =
4800 + 5000 =
100 + 440 =
310 - 40 =
600 + 600 =
6300 - 2600 =
70 + 30 =
710 - 620 =
5000 - 800 =
920 - 810 =
8100 - 7500 =
4600 - 1200 =

答案：

在$\square$里填上合适的数字。
$\begin{array}{r}9\square9\\-\square9\square\\\hline111\end{array}$ $\begin{array}{r}\square2\square\\-\square\square3\\\hline284\end{array}$

答案：