(1)(3又3/5+1又5/7)×11又2/3÷(1又2/9—1又1/18)(2)1.5×[19/21÷6又1/3×(0.7-0.66)]×4.9(3)(6.5—2又3/8)÷(1-1/4)÷2.75-75%×1又1/3(4)5/9+2X=2/3(5)(4.92+6又2/7+2.08+4又5/7)×(2又1/8—0.125+1)(6)13X—[4又1/2X+2.9]=3.4×0.5+0.5X这些题能简算的要简算,
(1)(3又3/5+1又5/7)×11又2/3÷(1又2/9—1又1/18)
(2)1.5×[19/21÷6又1/3×(0.7-0.66)]×4.9
(3)(6.5—2又3/8)÷(1-1/4)÷2.75-75%×1又1/3
(4)5/9+2X=2/3
(5)(4.92+6又2/7+2.08+4又5/7)×(2又1/8—0.125+1)
(6)13X—[4又1/2X+2.9]=3.4×0.5+0.5X
这些题能简算的要简算,
(1)=(18/5+12/7)×35/3÷3/18
=18/5×35/3+12/7×35/3÷3/18
=62×18/3
=372
(2)=3/2×(19/21÷19/3×1/25)×49/10
=3/2×(19/21×3/19×1/25)×49/10
=3/2×1/7×1/25×49/10
=21/500
(3)=(13/2-19/8)÷(1-1/4)÷2.75-3/4×4/3
=33/8×4/3×4/11-1
=11/2×4/11-1
=1
(4)2X=1/9
X=1/18
(5)=(7+11)×2
=36
鬼知道
(1)=(18/5+12/7)×35/3÷3/18
=18/5×35/3+12/7×35/3÷3/18
=62×18/3
=372
(2)=3/2×(19/21÷19/3×1/25)×49/10
=3/2×(19/21×3/19×1/25)×49/10
=3/2×1/7×1/25×49/10
=21/500
(3)=(13/2-19/8)÷(1-1/4)÷2.75-3/4×4/3
=33/8×4/3×4/11-1
=11/2×4/11-1
=1
(4)2X=1/9
X=1/18
(5)=(7+11)×2
=36
(6)13X-9/2X-2.9=3.4×1/2+1/2X
13X-5X=4.6
6X=4.6
X=23/30