One More and One Less

What number is one less than 43?

• 42

• 23

• 24

• 44

What number is one less than 1?

• 00

• 000

• 10

• 0

Fill in the missing number:

19, ?, 21, 22, 23, 24

• 20

• 18

• 12

• 17

one less than eleven is

• 10

• 13

• 12

• 14

one more than zero is

• 1

• 10

• 100

one more than forty nine is

• 50

• 48

• 51

• 94

one less than one hundred is

• 99

• 98

• 0

• 101

one more than seventy is

• 71

• 69

• 72

• 17

one less than ninety is

• 89

• 91

• 92

• 88