Mathematics
Addition & Subtraction
Procedural
6–7 yrs
Mental and written addition and subtraction
心算与笔算加减法
Description
Solve addition and subtraction problems using mental and written methods, including problems involving numbers, quantities, and measures
Mastery Evidence
- Solve a two-step problem: 'I had 35p, spent 12p, then found 5p. How much now?'
- Choose an appropriate method (mental or written) for a given problem
- Solve problems involving measures, e.g. 'a ribbon is 45cm, I cut off 18cm'
Assessment Prompt
If your child is given a problem involving lengths, weights, or prices, can they decide whether to add or subtract and carry out the calculation correctly?
Prerequisites 2
Adding two two-digit numbers
用心算或笔算方法解决实际问题,需要具备两位数加减法的程序性技能
Early Word Problems
情境化问题解决是在一年级应用题基础上的延伸
Unlocks 0
No follow-up topics