There are 64 subsets, and they are:{}, {A}, {1}, {2}, {3}, {4}, {5}, {A,1}, {A,2}, {A,3}, {A,4}, {A,5}, {1,2}, {1,3}, {1,4}, {1,5}, {2,3}, {2,4}, {2,5}, {3,4}, {3, 5}, {4,5}, {A, 1, 2}, {A, 1, 3}, {A, 1, 4}, {A, 1, 5}, {A, 2, 3}, {A, 2, 4}, {A, 2, 5}, {A, 3, 4}, {A, 3, 5}, {A, 4, 5}, {1, 2, 3}, {1, 2, 4}, {1, 2, 5}, {1, 3, 4}, {1, 3, 5}, {1, 4, 5}, {2, 3, 4}, {2, 3, 5}, {2, 4, 5}, {3, 4, 5}, {A, 1, 2, 3}, {A, 1, 2, 4}, {A, 1, 2, 5}, {A, 1, 3, 4}, {A, 1, 3, 5}, {A, 1, 4, 5}, {A, 2, 3, 4}, {A, 2, 3, 5}, {A, 2, 4, 5}, {A, 3, 4, 5}, {1, 2, 3, 4}, {1, 2, 3, 5}, {1, 2, 4, 5}, {1, 3, 4, 5}, {2, 3, 4, 5}, {A, 1, 2, 3, 4}, {A, 1, 2, 3, 5}, {A, 1, 2, 4, 5}, {A, 1, 3, 4, 5}, {A, 2, 3, 4, 5}, {1, 2, 3, 4, 5} {A, 1, 2, 3,,4, 5} .
-2 3/4 - 1/4 = -(2 3/4 + 1/4) = -[2 (3+1)/4] = -(2 4/4) = -(2 + 1) = -3 or -2 3/4 - 1/4 = - (4*2 + 3)/4 - 1/4 = -11/4 - 1/4 = (-11 - 1)/4 = -12/4 = -3
3/6 x 2/2 = 6/12 1/4 x 3/3 = 3/12 6/12 - 3/12 = 3/12 = 1/4 Answer: 1 quarter ------------------------------------- 3/6 - 1/4 = (1×3)/(2×3) - 1/4 = 1/2 - 1/4 = (1×2)/(2×2) - 1/4 = 2/4 - 1/4 = 1/4
3 3/4 - 1 1/4 = 2 2/4 = 2 1/2 15 / 4 - 5/ 4 = 10/ 4 = 2 2/ 4 = 2 1/2
1 4 5 1 3 6 2 4 4 6 3 1 8 1 1 3 3 4 1 2 7 2 3 5 4 1 5 5 1 4 1 5 4 6 3 1 1 1 8 7 2 1 4 3 3 3 4 3 5 3 2 2 5 3 5 4 1 6 1 3 1 6 3 2 1 7 1 7 2 1 8 1 4 4 2 4 2 4 2 7 1 4 5 1
1 1 1 2 1 3 1 4 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 4 4 1 4 2 4 3 4 4
[(-4) + (-3)]*[(-2 - (-1)] = (-4 -3)*(-2 + 1) = -7*-1 = +7[(-4) + (-3)]*[(-2 - (-1)] = (-4 -3)*(-2 + 1) = -7*-1 = +7[(-4) + (-3)]*[(-2 - (-1)] = (-4 -3)*(-2 + 1) = -7*-1 = +7[(-4) + (-3)]*[(-2 - (-1)] = (-4 -3)*(-2 + 1) = -7*-1 = +7
one and a half 1/2 = 2/4 half of 2/4 = 1/4 2/4 + 1/4 = 3/4 ------------------------------------------- 3/4 ÷ 1/2 = 3/4 × 2/1 = (3×2)/(4×1) = 6/4 = 3/2 = 1½
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1 1/4 - 3/4 = (1×4+1)/4 - 3/4 = 5/4 - 3/4 = (5-3)/4 = 2/4 = (1×2)/(2×2) = 1/2
1=1 2=2 3=3 4=4 5=4+1 6=4+2 7=4+3 8=4+4 9=4+4+1 or 3+3+3 10=1+2+3+4 now 11 of course is 10 + 1 so 11=1+2+3+4+1 12 is =1+2+3+4+2 13=1+2+3+4+3 and so on 20=2*(1+2+3+4) 21 =(2*(1+2+3+4))+1 and so on and 100=(1+2+3+4)*(1+2+3+4)
2/2 + 3/4 = 4/4 + 3/4= 7/4= 1 3/4 or 2/2= 1 +3/4= 1 3/4
Assuming 3 -4 means 3/4 , etc : The answer is 13/4 since(1/2) + (1/2) = 1 and(3/4) + [ (1/2)+(1/2) ] = 1 3/4
Several ways - here are four methods. 1 + 2 - 3 + 4 = 4 (3 - 1) + (4 - 2) = 4 (3 - 1) x 4 ÷ 2 = 4 3 x 4 ÷ (2 + 1) = 4
4
3-1=2 4-2=2 2+3-4+1=2 3-2+1=2
1=(4-3)÷(2-1)2=(4+2)-(3+1)3=3×2-4+14=4÷2+3-15=12-(3+4)6=(3×4)×1÷27=1+(3×4)÷28=4+2-1+39=41-3210=(1×4)+(3×2)11=42-3112=(4×3)×(2-1)13=12-3+414=(3×4)×1+215=(3×4)+1+216=2(3+4+1)17=3(4+2)-118=32-1419=14+3+220=4(2+3×1)21=(1+2)×(3+4)22=34-1223=4(3×2)-124=1×3×4×225=(4+1)×(3+2)26=2(4×3+1)27=1×3+2428=4(2×3+1)29=1+32-430=2(1+4)×331=34-1-232=2(1+3)×433=21+3×434=34(2-1)35=4+32-136=4(2+1)×337=14+2338=42-1-339=42-(3×1)40=43-1-241=43-(2×1)42=43-2+143=43(2-1)44=2+3(14)45=12×4-346=41+2+347=41+(3×2)48=24(3-1)49=I Don't Know50=13×4-2