Simple Add. & Sub. (Abacus 1-20) Hundreds

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คำแนะนำของผู้เขียน

Mental Math

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Addition and Subtraction - Math

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Ôn tập lớp 1

Addition and Subtraction - Math

Các em đọc kỹ câu hỏi, chọn đáp án đúng hoặc làm theo các yêu cầu. Nhấn Finish khi làm xong.

3 digit addition and subtraction

Addition and Subtraction - Math

Add and subtract

2-digit addition with regrouping

Addition and Subtraction - Math

2-digit addition with regrouping