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Place Value
History of Numbers
Integers
Number patterns
Order of operations
100

value of 5 in 25

Ones

100

'II' in normal numbers

2

100

5 + 5 is

10

100

missing number in 2,4,  ,8,10

6

100

4 divided by 1 times 2 

8

200

value of 7 in 75

tens

200

'V' in normal numbers

5

200
25 - 13 is

12

200

missing number in 7,14,21,  ,35

28

200

7 times 4 minus 3

25

300

value of 9 in 987

hundreds 

300

'IV' in normal numbers

4

300

30 divided by 5 is

6

300

missing number in 8,16,24,  , 40

32

300

10 divided by 5 times 6

12

400

value of 8 in 9854

hundreds 

400
'XV' in normal numbers

15

400

350 divided by 5 is

70

400

missing number in 72,63,  ,45, 36

54

400

10 times 5 minus 4 times 6

26

500

value of 4 in 567.4

tenths

500
'DXVI' in normal numbers

516

500

142 x 3 is

426

500

missing number in 144,132,   ,108,96

120

500
(7 times 4) minus ( 2 times 5) is

18