资源描述
一、脱式计算。
+× ×-× (-)×36
×(-) (13+)× ×12+
×57 +×16 ×+÷
×(-×) ×11- ×+×
+++ ×× 101×-
×48 ×34×7× ×+×
÷+÷
(+)×23+
×-÷ ×+× 32.6×+32.6×0.2
×+÷6 465× ×+×
-(+) [1-(+)]÷ ×58+×42
××- ×6+÷ 180÷2.5÷4
96-3.2×0.5+0.4 9.6÷(9.6×4)
2.08×(9.6÷2.4)÷4.8 78×0.69+1.2×6.9+6.9 0.78÷0.25×4
×× ÷÷ ×÷
÷+×7 (13+)÷13 ×÷×3
2.6×1.9÷2.6×1.9
17.64÷4.9+6.73 3.4÷[(1.2+0.5)×5] 0.25×12.5×3.2
+ (+)
2.65×1.7+1.35×1.7 23.4÷7.8-2.1
0.75×18÷0.15 2.5×3.2×1.25 2842÷14+74×3
+-+ 5.2-11÷7-×3 4÷1+6×
×4÷4× ÷[(-)÷] 1+++++
7.6×÷[1.9-1.9×(1.9-1.9)] (5 -1.8)÷[(1.15+)×1 ]
14 -6.46-3.54 4.2÷1.5-1.5×0.6 (0.92+)÷(4-2 )
(4 -3 )÷(+) 51.6÷[(3 -1.25)×]
19.98×37-199.8×1.9+1998×0.82 9999×7+1111×37
231÷231 (70+)× 8.89×36+8.89×63+8.89
1-1÷2-1÷3- 2007× 216×( -
1.65÷5+1.29×0.2+×20% (+)×3+
×[-(-)] 24×(-)÷ 4.85×0.17+0.485×8.3
+×99+ 2-2.86×(6.25-6) 54.2-+4.8-
0.7÷[(-)×24] 1.47÷(2-1.02)+0.61×14 2000÷12.5÷25÷0.8÷4
÷9×÷ +(-)× (+)×15-45÷49
×+÷ [(-)×]÷ (+)÷(÷4-)
7.28-(1.25+0.28) 9990×200.8+1×2008 0.8×4×12.5×2.5
÷[(+)×] 4×0.6+0.6÷ 33.02-(148.4-90.85)÷2.5
(1÷+÷1)÷5.1 (1.6×+3.6÷)× ×7.27+2.73×
[1-(+)]÷ 56×(+-) (-)÷(+)
÷[×(+)] +× ×[()÷]
4.85-+5.15- +×(-) 5×(+ )×17
- ×( + )
10.2-(1.25 + 2.5)÷1.5 1÷(+ 2.5×) - ×( + )
×40-÷ 34×(+)×13 [1-(-)]×
(-×)÷ ÷[(-)×3] (8×+÷)×12.5
+× ÷[(+)×] (+-)÷
×-÷7 8.24-2.4÷2.5÷0.4 2-÷÷
6.75-+3.25- ÷[×(+)]
×36
÷[-(+)]
÷ ×
×4÷×4 ÷ ÷
(-)×(4-) 17×[(+1.5)÷]
×+÷ ÷9×÷ +(-)×
[(-)×]÷ (+)÷(÷4-) (+)×15-45÷49
++++++++
×(+)+0.8 11÷〔×(+)〕 ÷ [ ×(+ )]
×[()÷]
×(÷+ ) 51.6÷[(3 -1.25)×]
(0.92+)÷(4-2 ) (5 -1.8)÷[(1.15+)×1 ]
(+)÷+ [1-(-)]× 3.64×[1÷(2-2.09)]
(2+1+2+3. 375)× +÷ + (+0.2)×÷(3—0.5)
7 5
(+)÷× ×〔÷(-)〕 ÷[(+)×]
(+)×24 0.5+×(0.15+)
×3.8+5.2×80%+0.8 (-)×12÷0.1
+++……++ +
+++……+
二、解方程。
X×(1-)=3.6 -X=
×(X-)=0 5X-3×= 5-X=
5×(X-)=2
χ×(1+)=250 χ-χ=0.3 χ+χ=
χ×(1--)=550 10×X= 33÷X=
X××=4 X×=18× χ+χ=9.5
3.2×4+50x=112.8 0.3x-0.8×60=72 5.9x-2.4x=7
5×1.3-2x=5.5 5x-2+1.8=3.6 7(x-1.2)=2.1
3.2×4+50x=112.8 0.3x-0.8×60=725.9 x-2.4x=7
5×1.3-2x=5.5 0.8×(7.2+х)=7.92 6.2х-х=41.6
χ+χ-6= 1-= 4-7×1.3=9.9
4×(x-0.8)=8 ÷x= (6+3x)÷2=18
x-0.15x=8.5 0.8×(x-0.4)=8 x + x=15
16-6.4=36 x-x =3
1-=
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