【简算、解方程、四则混合运算各90道,】
简算、解方程、四则混合运算各90道,
【简算、解方程、四则混合运算各90道,】
简算、解方程、四则混合运算各90道,
125÷(50÷8)
=125÷50×8
=125×8÷50
=1000÷50
=20
7.2×1.02
=7.2×(1+0.02)
=7.2×1+7.2×0.02
=7.2+0.144
=7.344
9又9/16÷9
=(9+9/16)÷9
=9÷9+9/16÷9
=1+1/16
=17/16
(90+1/88)×1/89
=(90×88+1)/88×1/89
=[(89+1)×(89-1)+1]/88×1/89
=[89^2-1^2+1]/88×1/89
=89^2/88×1/89
=89/88
(1/3-1/4)+(1/4-1/5)+(1/5-1/6)
=1/3-1/4+1/4-1/5+1/5-1/6
=1/3-1/6
=1
7.6×1/2÷[1.9-1.9×(1.9-1.9)]
=7.6×1/2÷(1.9-0)
=3.8÷1.9
=2
1又1/6×1又1/7×1又1/8×1又1/9×1又1/10
=7/6×8/7×9/8×10/9×11/10
=11/6
3.26×[1÷(1/10-9/100)]
=3.26×[1÷(10/100-9/100)]
=3.26×(1÷1/100)
=3.26×100
=326
(2.5+2.5+2.5+2.5)×25×8
=(2.5×4)×25×4×2
=10×100×2
=2000
(6.9×0.125×1.75)÷(2.3×1/8×1/4)
=6.9×0.125×1.75÷2.3÷1/8÷1/4
=6.9÷2.3×0.125×8×1.75×4
=3×1×7
=21
[5-(0.5×9又1/2+1/2×1/2)]÷8/21
=[5-(1/2×19/2+1/2×1/2)]×21/8
=[5-1/2×(19/2+1/2)]×21/8
=(5-1/2×10)×21/8
=(5-5)×21/8
=0
(12又13/25+7又8/17)×2.5+(9又9/17+10又12/25)2又1/2
=(12又13/25+7又8/17)×2.5+(9又9/17+10又12/25)×2.5
=(12又13/25+7又8/17+9又9/17+10又12/25)×2.5
=(23+17)×2.5
=40×2.5
=100
1又2/3×[7又5/6+(4.125-4又1/8)-4又5/6]
=5/3×[7又5/6-4又5/6+(4又1/8-4又1/8)]
=5/3×(3+0)
=5
8又17/23+5又1/4-6又17/23+0.75
=(8又17/23-6又17/23)+(5.25+0.75)
=2+6
=8
(5又5/9-0.8+2又4/9)×12.5
=(5又5/9+2又4/9-0.8)×12.5
=(8-0.8)×12.5
=8×12.5-0.8×12.5
=100-10
=90
2.25×3/7×0.4×2又1/3
=2.25×0.4×3/7×7/3
=0.9×1
=0.9
0.91÷4/5+1.25×1.09
=0.91×5/4+5/4×1.09
=5/4×(0.91+1.09)
=5/4×2
=2.5
9又2000/2001×1949
=(10-1/2001)×1949
=10×1949-1/2001×1949
=19490-1949/2001
=10489+(1-1949/2001)
=10489+52/2001
=10489又52/2001
24×51/43+51×19/43
=24×51/43+19×51/43
=(24+19)×51/43
=43×51/43
=51
13.76-(7/12+1.76+1又5/12)
=13.76-[1.76+(7/12+1又5/12)]
=13.76-1.76-2
=12-2
=10
19.98×37-199.8×1.9+1998×0.82
=199.8×3.7-199.8×1.9+199.8×8.2
=199.8×(3.7-1.9+8.2)
=199.8×10
=1998
0.32×6.7+3.2×0.43-0.32
=3.2×0.67+3.2×0.43-3.2×0.1
=3.2×(0.67+0.43-0.1)
=3.2×1
=3.2
2.5×12.5×32-32-563
=2.5×12.5×4×8-(32+563)
=(2.5×4)×(12.5×8)-595
=10×100-595
=1000-595
=405
9又3/4-15/19-2/19×2
=9又3/4-(15/19+4/19)
=9又3/4-1
=8又3/4
(2/3+1/5)+(2/3-12/17)-(1/5+5/17)
=2/3+1/5+2
题数好像不够、、、、、、、、、、、、
你要是有教材全解,可以从那上面找。
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