7 ones + 5 ones = 12 ones Image caption, You need to group the ten into the tens column. We do this by marking it like this. Now you add the next column - the tens. 3 tens + 2 tens + 1 ten (from ...
7 ones + 5 ones = 12 ones Image caption, You need to group the ten into the tens column. We do this by marking it like this. Now you add the next column - the tens. 3 tens + 2 tens + 1 ten (from ...
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