Counting on

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# Counting on - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about 'Counting on' - raanan

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Example:

27+40 =

67

+10

+10

+10

+10

27

37

47

57

67

Example:

20

40

7

27 + 40 =

+

+

27

60

=

+

=

67

20

7

Example:

50

80

3

53 + 80 =

+

+

53

130

=

+

=

133

50

3

### 2-digit number with a multiple of ten

Example:

90

80

7

97 + 80 =

+

+

97

170

=

+

=

177

90

7

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?

=___________

2-digit number with a multiple of ten

\$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

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