Toán Lớp 7: 1,tính hợp lí
a.3/5.(-8/3)-3/5:(-3/2)
b-5/6.-12/7-(-21/15)
c.0,125)^650.8^102
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Toán Lớp 7: 1,tính hợp lí
a.3/5.(-8/3)-3/5:(-3/2)
b-5/6.-12/7-(-21/15)
c.0,125)^650.8^102
Comments ( 1 )
=(4/39-43/39)+(-5/12+17/12)
=(-1)+1
=0
b)-5/6.-12/7-(-21/15)
=5/6. 12/7+21/15
=10/7+21/15
=150/105+147/105
=99/35
=(0,125)^548.(0,125)^102. 8^102
=(0,125)^548. (0,125.8)^102
=(0,125)^548. 1^102
=(0,125)^548