Arithmetic Grade Five

Lesson Seventy-one: Three Digit Divisor

You solve a division problem with a three digit divisor in the same way you solve a division problem with a one or two digit divisor. The only difference is that the divisor is larger. Here's an example: 


	    +------
	100 | 3455
You follow the same steps you used with two digit divisors: 

	1. Divide (or estimate)
	2. Multiply
	3. Subtract
	4. Bring Down (and repeat) or Remainder
Here's the whole problem: 

                34 r55		1. Divide (345/100=3)
	    +------		2. Multiply (100 x 3 = 300)
	100 | 3455		3. Subtract (345 - 300 = 45)
              300		4. Bring down the 5
             ------		5. Divide (455/100=4)
               455		6. Multiply (100 x 4 = 400)
               400		7. Subtract (455 - 400 = 55)
              -----		8. Remainder 55
                55

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