math
1+5x3-1/2
15 1/2
what flies but never touches the ground?
air
8+4-2x90+1
169
John has 5 1x3 index cards and 3 5x5 index cards.He sells some and ends up with 3 cards in total.One card is 1x3 the rest is 5x5.
1.how many 5x5 cards does he have?
2.how many did he sell?
1.2
2.5
500 divided by 9x3-100
66.6666667
a=1
b=2
ax87x6-b
520