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1, 10, or 100 More/Less of 2-Digit and 3-Digit N ...

English 18 Public

Mentally add or subtract 1, 10 or 100 to a given 2-digit or 3-digit number.

Study Slideshow

one hundred less than 521

421

15

one more than 69

70

15

1 less than 40

39

25

88 - 10

78

15

1 less than 52

51

15

10 more than 11

21

15

10 less than 50

40

25

10 more than 24

35

15

10 more than 17

27

15

one more than 49

50

20

one less than 60

59

20

1 less than 25

24

20

1 more than 68

69

20

44 + 10

54

15

56 - 10

46

15

1 more than 73

74

15

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