6.5Ã8+3.5Ã8-47
=52+28-47 =80-47 =33 (80-9.8)Ã5åä¹2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8Ã7åä¹4÷[1÷(3.2-2.95)]
=8Ã4/7÷[1÷0.25]
=8Ã4/7÷4
=8/7
2700Ã(506-499)÷900
=2700Ã7÷900
=18900÷900
=21
33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5
=33.02-23.02
=10
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