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100

What is one less than 18?

17

100

What is one more than 21?

22

100

What is 10 less than 10?

0

100

What is 10 more than 17?

27

100

What is 123+10?

133

200

What is one less than 78?

77

200

What is one more than 46?

47

200

What is 10 less than 76?

66

200

What is 10 more than 65?

75

200

What is 568+100?

668
300

What is one less than 90?

89

300

What is one more than 45?

46

300

What is 10 less than 100?

90
300

What is 10 more than 546?

556

300

What is 768+200?

968

400

What is one less than 124?

123

400

What is one more than 876?

877

400

What is 10 less than 658?

648

400

What is 10 more 870?

880

400

What is 400+507?

907

500

What is one less than 567?

566

500

What is one more than 998?

999

500

What is 10 less than 978?

968

500

What is 10 more than 953?

963

500

What is 967+100?

1067