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Division by two-digit and three-digit numbers

When the divisor is not a single digit, long division (“the division bracket”) keeps the same idea: at each step you take a partial dividend and ask how many times the whole divisor fits — that gives the next digit of the quotient. Before computing, it helps to estimate the answer: round the divisor to a “round” number and say whether the quotient is closer to tens, hundreds, and so on. Check: quotient×divisor+remainder=dividend\text{quotient}\times\text{divisor}+\text{remainder}=\text{dividend}; if there is a remainder, it is always less than the divisor.
Estimate the quotient by rounding the divisor
At each step divide by the entire divisor, not one digit
Remainder is less than the divisor; even division means remainder zero
Connects to multiplying by two- and three-digit numbers from the last lesson
By a two-digit divisor
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