1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

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1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California

description

Step Two Write down '1x=' to the left of the divisor. Leave two spaces in between. _________ 1x = 37)

Transcript of 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Page 1: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

1-2-4-8 DivisionBy

Mr. EnglishGold Ridge Elementary School

Folsom, California

Page 2: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step One

• What is our problem to solve. It is written below.

_________• 37 ) 8 5 4 3 4

Page 3: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Two• Write down '1x=' to the left of the divisor.

Leave two spaces in between.

_________• 1x = 37) 8 5 4 3 4

Page 4: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Three

• Write down '2x=' right below the '1x='.

_________• 1x = 37) 8 5 4 3 4• 2x =

Page 5: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Four

• Double the divisor and write it underneath - keeping the ones column lined up. Doubling 37 gets you 74.

___________• 1x = 37) 8 5 4 3 4• 2x = 74

Page 6: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Five

• Write down '4x=' right below the '2x='. (It would be easy to write three X instead, but remember you are doubling.

• ______________• 1x = 37) 8 5 4 3 4• 2x = 74• 4x =

Page 7: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Six

• Double the divisor again and write it underneath - keeping the ones column lined up. Doubling 74 gets you 148.

• _________• 1x = 37) 8 5 4 3 4• 2x = 74• 4x = 148

Page 8: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Seven

• Write down '8x=' right below the '4x='.

• _________• 1x = 37) 8 5 4 3 4• 2x = 74• 4x = 148• 8x =

Page 9: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Eight

• Double the divisor again and write it underneath - keeping the ones column lined up. Doubling 148 gets you 296.

• __________• 1x = 37) 8 5 4 3 4• 2x = 74• 4x = 148• 8x = 296

Page 10: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Nine• Look at the first two numbers in the dividend. They are “85”.

Choose the number from the divisor column that is closest to 85 to write under the dividend.

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 7 4• 4x = 148• 8x = 296

Page 11: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Ten• Fill in to the right with zeros. Say to yourself, "ZERO, ZERO,

ZERO.”

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 7 4 0 0 0• 4x = 148• 8x = 296

Page 12: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Eleven• Write the multiplier you used (1, 2, 4, or 8) on the right,

followed by the same number of zeros you just wrote. Say to yourself, "ZERO, ZERO, ZERO.”

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 7 4 0 0 0 2000• 4x = 148• 8x = 296

Page 13: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twelve• Subtract.

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0 • 4x = 148 1 1 4 3 4• 8x = 296

Page 14: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Thirteen• Choose the best number from the divisor column to write under the

dividend. Add enough 0’s to make sure your numbers align correctly.

• ________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 0 7 4

Page 15: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Fourteen• Fill in to the right with zeros. Say to yourself, "ZERO, ZERO.”

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 7 4 0 0

Page 16: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Fifteen• Write the multiplier you used (1, 2, 4, or 8) on the right, followed by

the same number of zeros you just wrote. Say to yourself, "ZERO, ZERO.”

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 0 7 4 0 0 2 0 0

Page 17: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Sixteen• Subtract.

_________1x = 37) 8 5 4 3 42x = 74 – 7 4 0 0 0 2 0 0 04x = 148 1 1 4 3 48x = 296 - 0 7 4 0 0 2 0 0 4 0 3 4

Page 18: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Seventeen• Choose the best number from the divisor column to write under the

dividend. Add enough 0’s to make sure your numbers align correctly.

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 - 7 4 0 0 2 0 0• 4 0 3 4• 3 7

Page 19: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Eighteen• Fill in to the right with zeros. Say to yourself, "ZERO, ZERO.”

• _________• 1x = 37) 8 5 4 3 4• 2x = 74 – 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 - 7 4 0 0 2 0 0• 3 7 0 0

Page 20: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Nineteen• Write the multiplier you used (1, 2, 4, or 8) on the right, followed by

the same number of zeros you just wrote.

• ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• 3 7 0 0 1 0 0

Page 21: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty• Subtract.

• ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4

Page 22: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-One• Choose the best number from the divisor column to write under

what's left of the dividend. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• 2 9 6

Page 23: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-Two• Write the multiplier you used (1, 2, 4, or 8) on the right. No need to

write any zeros afterwards. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• 2 9 6 8

Page 24: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-Three• Subtract. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8

Page 25: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-Four• Choose the best number from the divisor column to write under

what's left of the dividend. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8 3 7

Page 26: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-FiveWrite the multiplier you used (1, 2, 4, or 8) on the right. No need to write any

zeros afterwards. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8 3 7 1

Page 27: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-SixSubtract. ==> Notice that the amount left over is less than the divisor - so

you're done. ________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8 -3 7 1 1

Page 28: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-Seven• Add up your answer on the right. The remainder is 1.

________• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8 -3 7 + 1 1 2 3 0 9

Page 29: 1-2-4-8 Division By Mr. English Gold Ridge Elementary School Folsom, California.

Step Twenty-Eight• Write the answer on the top.

2 3 0 9 R 1• 1x = 37) 8 5 4 3 4• 2x = 74 - 7 4 0 0 0 2 0 0 0• 4x = 148 1 1 4 3 4• 8x = 296 – 0 7 4 0 0 2 0 0• 4 0 3 4• - 3 7 0 0 1 0 0• 3 3 4• - 2 9 6 8 3 8 -3 7 + 1 1 2 3 0 9