加减法中的未知数
Unknown in Addition & Subtraction
在涉及三个整数的加法或减法算式中，确定未知的整数。
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers
学习证据 / Evidence
- 算出 8 + ? = 11，并写出答案 3
- 算出 5 = □ − 3，并写出答案 8
- 算出 6 + 6 = □，并写出答案 12
- Solve 8 + ? = 11 and write 3
- Solve 5 = □ − 3 and write 8
- Solve 6 + 6 = □ and write 12
评估问题 / Assessment
如果{{name}}在纸上看到“? + 6 = 14”或“9 − ? = 4”，他们能算出空格里应该填哪个数字吗？
If {{name}} sees '? + 6 = 14' or '9 − ? = 4' written on paper, can they figure out what number goes in the gap?