fraction arithmetic
decimal arithmetic
conversions
geometric sums
gauss sequences
100
2/5 - 1/10
3/10
100
21.45 + 73.2
94.65
100
Convert 0.4 to a fraction
2/5
100
1/2 + 1/8 + 1/32 + ...
2/3
100
1 + 2 + 3 + ... + 15
120
200
12/19 x 38/14
12/7
200
856.38 - 247.004
609.376
200
Convert 19/20 to a decimal
0.95
200
1/8 + 1/16 + 1/32 + .... + 1/256
63/256
200
1 + 2 + 3 + ... + 70
2485
300
7/9 + 9/7 - 4/3
46/63
300
7.5 x 1.9 + 7.5 x 8.1
75
300
Convert 0.515151... to a fraction
17/33
300
1/3 + 1/9 + 1/27 + ... + 1/243
121/243
300
33 + 34 + 35 + .... + 91
3658
400
(5/32 ÷ 1/81)(22/27 ÷ 9/4)
55/12
400
17.28 ÷ 12 x 0.5
0.72
400
Convert 4/19 to a percentage rounded to the nearest whole number
21%
400
2/5 + 6/25 + 18/125 + ..
1
400
1 + 4 + 7 + .... + 100
1717
500
46/67
500
376 ÷ 0.08 - 4800 + 543 x 0.1
-45.7
500
Convert 0.1232323... to a fraction
61/495
500
-35/3 - 5 - 15/7 - ...
-245/12
500
18 + 25 + 32 + ... + 151
1690