addition
27+39
66
97-38
59
3x3
9
9÷3
what does "<" mean?
less than
274+588
862
437-312
125
8x8
64
25÷5
5
what does "π" mean
pi
373+297+524
1,194
2,345-1,234
1,111
12x12
144
81÷9
9
what does "PEMDAS" stand for
Parenthesis
exponent
multiplication
division
addition
subtraction
1,276+324+1,981
3,581
14,517-10,628
3,889
25x13
325
144÷12
12
what does "∟ " mean
right angle
3,636+4,747+2,525
10,908
47,816-22,797
25,019
98x72
7,056
366÷6
61
987,654,321-123,456,789
864,197,532