Adding/Subtracting 10s/1s

Using what we know

100

20 + 20 

40

200

30 + 40

70

300

40 + 50

90

400

900 - 800

100

500

20 + 80

100

Adding/Subtracting Ones

100

54 + 2

56

200

98 - 5

93

300

74 + 4

78

400

68 - 5

63

500

106 - 4

102

Adding/Subtracting Tens

100

30 + 10

40

200

45 + 20

65

300

67 + 20

97

400

87 - 30

57

500

96 - 40

56

Tens and Ones!

100

35 + 11

46

200

55 + 21

76

300

98 - 11

87

400

65 - 31

34

500

84 - 23

61

Review

100

Is 8 even or odd? How do you know?

Even

200

Greater than, less than, or equal to?

654             753

Less than  <

300

Ms. H had 5 pumpkins. She bought 8 more. How many pumpkins does Ms. H have now?

13

400

Ms. Ramiza drew a line that was 5 inches. Ms. H drew a line that was 9 inches. What is the difference between their lines?

4 inches

500

Ms. Gibbens had a pencil that was 6 inches long. Ms. Hensler had a pencil that was 8 centimeters long. Ms. Hensler said her pencil was shorter. Is she correct? Why?

Yes because centimeters is a smaller unit than inches.