Mastering Large Number Operations

Front

Adding two 6-digit numbers

Back

up digits by place value, add from right to left

Front

Carrying over in addition

Back

sum in a column is 10 or more, carry to next column

Front

Back

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Front

Subtracting large numbers

Back

up digits, subtract from right to left

Front

Borrowing in subtraction

Back

top digit is smaller, borrow from next left column

Front

Back

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Front

Checking addition with subtraction

Back

one addend from the sum to get the other addend

Front

Zeros in large numbers

Back

for value, important in alignment

Front

Adding three large numbers

Back

two numbers first, then add the third

Front

Subtracting across zeros

Back

from the next non-zero digit to the left