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jawaban soal B
jawaban soal C
jawaban soal D
jawaban soal E
= 2*2/15*2 - 1*15/2*15 + 3*3/10*3
= 4/30 - 15/30 + 9/30
= -2/30
= -1/15
b. 3/7 + 4/21 - 13/14
= 18/42 + 8/42 - 39/42
= -13/42
c. 4 2/5 - 1 1/3 + 2 3/4
= 4 24/60 - 1 20/60 + 2 45/60
= 5 49/60
d. 10 1/4 + 1 2/3 + 20 7/8
= 10 12/48 + 1 32/48 + 20 42/48
= 31 41/24
= 32 17/24
e. 2,25 + 25% + 1 1/2
= 2,25 + 0,25 + 3/2
= 2,5 + 1,5
= 4