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Counting on

Counting on. Example:. 27+40 =. 67. +10. +10. +10. +10. 27. 37. 47. 57. 67. Addition. 2-digit number with a multiple of ten. Example:. 20. 40. 7. 27 + 40 =. +. +. Addition. 27. 60. =. +. =. 67. 20. 7. 2-digit number with a multiple of ten. Example:. 50. 80. 3.

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Counting on

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  1. Counting on Example: 27+40 = 67 +10 +10 +10 +10 27 37 47 57 67 Addition

  2. 2-digit number with a multiple of ten Example: 20 40 7 27 + 40 = + + Addition 27 60 = + = 67 20 7

  3. 2-digit number with a multiple of ten Example: 50 80 3 53 + 80 = + + Addition 53 130 = + = 133 50 3

  4. 2-digit number with a multiple of ten Example: 90 80 7 97 + 80 = + + Addition 97 170 = + = 177 90 7

  5. Practical Application $2 each Siti bought the items listed below. $4 each $3 each Siti paid the shopkeeper $100.00. How much change will she receive? =___________

  6. 2-digit number with a multiple of ten • Add $16 + $4 + $15 = $10 + $6 + $4 + $10 + $5 = $20 + $10 + $5 $10 $6 $10 $5 = $35 +10 +1 +1 +1 +1 10 20 9 10 6 7 8

  7. What is the total cost of two toy cars below? B$447 $530 $447 = $400 + $40 + $7 $530 = $500 + $30 $447 + $530 = $400 + $500 + $40 + $30 + $7 = $ 900 + $70 + = B$977

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