1.)a) 4/8×258=1/2×258= 258/2=129
b) 6/9×732=2/3×732=732×2/3=1464/3=488
c)18/6×121=3×121=363
d) 48/36×927=4/3×927=927×4/3=309×4=1236
e)125/75×624=5/3×624=624×5/3=208×5=1040
f)36/27×540=4/3×540=540×4/3=180×4=720
2.)a) 1/2×2500=2500/2=1250
b) 3/5×240=240×3/5=720/5=124
c)2/7×700=700×2/7=1400/7=200
d)2/3×420=420×2/3=840/3=280
e)5/6×210=210×5/6=1050/6=175
f)3/8×400=400×3/8=2400/8=300