The answer is wrong. But you don't know where the mistake happened among the 6 rows.Even if you ask the student, they say, 'I ...
They are counting addition and subtraction with their fingers.Even though the answers are correct, it takes a long time to finish one sheet.This is an addition and subtraction print set for such ...
Abacus is an ancient calculating tool that can be used for various mathematical calculations like addition, subtraction, multiplication, division or even for basic counting. The design of this tool ...
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