Mental Math
5 - 10 × 2
-15
(2/3) - (1/3)
1/3
2.3 + 1.2
3.5
21
2
10 + 10 ÷ 2
15
6 ÷ 3 - 20
-18
(2/9) ÷ (1/2)
4/9
30.99 - 23.12
7.87
82
64
32 ÷ (2 + 1 × 7)
1
26 + 7 - 20 ÷ 20
70
(5/11) + (5/7) + (1/11)
97/77
50.05 + 5.50
55.55
902
8100
82 - 3 × (5 + 6 ÷ 3)
43
25 + 6 - 5 × 3 - 7
9
(1/37) + (2/37) + (3/37) + (4/37) + (5/37)
15/37
3.10 × 1.2
3.72
83
512
102 - (5 + 6) ÷ 1 + 20 ÷ 10 - 5
86
92 + 7 - 20 + 5 × 31 + 2
85
(5/100) + (2/100) - (20/10) - (3/100)
-49/25
1.00005 ÷ 0.0005
2000.1
1252
15625
20 + 3 + 3 ÷ 3 + 32 - 5 × (1 + 1 + 1 ÷ 1) - 22
14