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B. 1 5/8 + 3/7 + 1 1/2 = 13/8 + 3/7 + 3/2
= 91/56 + 24/56 + 84/56
= 199/56 = 3,55
C. 4 1/3-2 2/10 + 1 1/5 = (4-2+1) 1/3 -2/10 + 1/5
= 3 10/30-6/30+2/30
= 3 6/30 = 96/30 = 3,2.
D. 1 5/6×2 1/3×3 1/4 = 11/6×7/3×13/4
= 1001/72 = 13,90
E. 37,59×4,5 = 3759/100 × 45/10
= 169155/1000
= 169,155
F. 3/4=120/a
3a=480
a=480/3
a= 160