32 x 25 Multiplying By 25 32 x 25 1.Divide the non-25 number by 4. 2.Add two zeroes. 4 = 8 +00 =8 00 (1/4 rule) 32.

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Presentation transcript:

32 x 25 Multiplying By x 25 1.Divide the non-25 number by 4. 2.Add two zeroes. 4 = =8 00 (1/4 rule) 32

What happens when the number is not divisible by 25? (1/4 rule) 29 x 25

What happens when the number is not divisible by 25? (1/4 rule) 29 x 25 1.Divide the non-25 number by 4. 2.For each remainder, add 25 4 = 7 +25(1) =

What happens when the number is not divisible by 25? (1/4 rule) 30 x 25

What happens when the number is not divisible by 25? (1/4 rule) 30 x 25 1.Divide the non-25 number by 4. 2.For each remainder, add 25 4 = 7 +25(2) =

What happens when the number is not divisible by 25? (1/4 rule) 31 x 25

What happens when the number is not divisible by 25? (1/4 rule) 30 x 25 1.Divide the non-25 number by 4. 2.For each remainder, add 25 4 = 7 +25(3) =

Multiplying By 25 Drill Depending on how much you would like to practice, number your notebook paper 1 thru 100. For the next slides you will have 6 seconds per slide. Try doing the questions mentally.

At any point you want to stop, go to the very end of this presentation to check your answers. Award yourself 5 points for every correct answer. Deduct 4 points for every wrong answer, scratched out answer, skipped problem, and problem you had scratch work.

Multiplying By 25 Drill The highest possible score will be 500, the lowest The more you practice the better you will get! Have FUN!!

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Multiplying by 25 Drill Answer key part one 1) 75 2) ) 450 4) ) 475 6) ) 775 8) 800 9) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 25 60) 550

Multiplying by 25 Drill Answer key part two 61) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 50 87) ) ) ) ) ) ) ) ) ) ) ) ) ) 1950