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MEAP Review: Multi Digit Multiplication and Division of Whole Numbers and Decimals

MEAP Review: Multi Digit Multiplication and Division of Whole Numbers and Decimals. MULTI-DIGIT MULTIPLICATION. 5. 2. 5. 3. 2. 1. Erase your "carried" numbers so you dont get confused!. 373. First, we must put a place holder under the ones. Erase your "carried" numbers

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MEAP Review: Multi Digit Multiplication and Division of Whole Numbers and Decimals

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  1. MEAP Review: Multi Digit Multiplication and Division of Whole Numbers and Decimals

  2. MULTI-DIGIT MULTIPLICATION

  3. 5 2 5 3 2 1 Erase your "carried" numbers so you dont get confused! 373 First, we must put a place holder under the ones. Erase your "carried" numbers so you dont get confused. Multiply and "CARRY" - Just like addition! Start with the ones. Do a 'SPRAY'. Now do the tens- Use a 'SPRAY'! We must put place holders under the ones and tens. x 875 Now let's do the hundreds using a "spray". 1 1 18 6 5 + 1 Now add! 26 1 1 0 29 8 4 0 0 3 2 6 3 7 5

  4. 1 4 1 3 1 Erase your "carried" numbers so you dont get confused! 554 First, we must put a place holder under the ones. Erase your "carried" numbers so you dont get confused. Multiply and "CARRY" - Just like addition! Start with the ones. Do a 'SPRAY'. Now do the tens- Use a 'SPRAY'! We must put place holders under the ones and tens. x 328 Now let's do the hundreds using a "spray". 1 1 44 3 2 + Now add! 11 0 8 0 16 6 2 0 0 1 8 1 7 1 2

  5. 1 4 1 1 3 1 Erase your "carried" numbers so you dont get confused! 369 First, we must put a place holder under the ones. Erase your "carried" numbers so you dont get confused. Multiply and "CARRY" - Just like addition! Start with the ones. Do a 'SPRAY'. Now do the tens- Use a 'SPRAY'! We must put place holders under the ones and tens. x 225 Now let's do the hundreds using a "spray". 2 1 18 4 5 + 1 Now add! 7 3 8 0 7 3 8 0 0 8 3 0 2 5

  6. Now take 5minutes to do these problems: 62x48= 643x25= 246x 174= 438x 347= 752x100= .

  7. ANSWERS 62x48= 2976 643x25=16,075 246x 174=42,804 438x 347=151,986 752x100=75,200 .

  8. MULTI-DIGIT Division

  9. Dividing Difficult Large Numbers 31) 1719 • 31 will not go into 1 • 31 will not go into 17 • 31 will go into 171

  10. Dividing Difficult Large Numbers 31) 1719 To figure what your first number will be cover the 1 in 31 & the 1 in 171.

  11. Dividing Difficult Large Numbers 31) 1719 Now ask how many 3’s will go into 17.

  12. Dividing Difficult Large Numbers 5 31) 1719 Be sure to put that number directly above the 1 not the 7.

  13. Dividing Difficult Large Numbers 5 31) 1719 Now multiply the 5 x 31 and place it under the 171.

  14. Dividing Difficult Large Numbers 5 31) 1719 155 31 x5 16 9 155

  15. Dividing Difficult Large Numbers 5 31) 1719 155 16 9 Now cover up the 1 in 31 & the 9 in 169

  16. Dividing Difficult Large Numbers 5 31) 1719 155 16 9 Ask how many 3’s will go into 16.

  17. Dividing Difficult Large Numbers 5 5 31) 1719 155 16 9 Place that number next to the 5 in your quotient.

  18. Dividing Difficult Large Numbers 5 5 31) 1719 155 16 9 Now multiply 31 x 5.

  19. Dividing Difficult Large Numbers 5 5 31) 1719 155 16 9 Subtract & your answer is 55 R14 155 14

  20. Dividing Difficult Large Numbers 5 5 31) 1719 155 31 X 5 169 9 155 155

  21. Check It Using the Inverse of Division: 31 Multiply the divisor by the quotient. X 55 155 +1550 1705 + 14 Add Remainder to the product 1719 Your answer should math the original dividend

  22. Multiplying and Dividing by powers of ten MEAP REVIEW

  23. 5 3 7 4 8 2 What are the PLACE VALUES of the digits in this number?

  24. 5 3 7 4 8 2 So that means 500 + 30 + 7 + + +

  25. 5 3 7 4 8 2 The decimal point just separates the whole numbers from the decimal fractions

  26. 5 3 7 4 8 2 What happens when I multiply this number by 10 ?

  27. 5 3 7 4 8 2 Each digits value will become 10 times bigger so the digits move LEFT into the next column

  28. Multiplying by 10 537.482 x 10 = 5374.82 It LOOKS like the decimal point moves one place to the right. (and that is how many teachers ask you to think of it)

  29. Multiplying by 10 Moving the digits one place to the LEFT looks the same as moving the decimal point one place to the RIGHT. 5 3 7 4 8 2 5 3 7 4 8 2

  30. More Multiplying and Dividing

  31. I hope I haven’t LEFT you confused but I thought we should get this RIGHT Thanks for watching. To practice multiplying and dividing by multiples of ten, click on this website: http://www.bbc.co.uk/skillswise/numbers/wholenumbers/multiplication/multiply10and100/quiz.shtml

  32. Get ready to boost these BAMZOOKI Zooks against the clock. Game on! • Bamzooki Multiplying and Dividing • Quiz following the Investigation

  33. Then…. • You’ll need all your mental maths skills to escape with the bio-rods in this exciting Mission 2110 game. • Alien Game • Homework TIME • Multiplication and Division Practice Handout

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