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小学数学四则运算——简便运算大汇总
简便运算
4+3.2+5+6.8 25×(8×0.4)×1.25 7-(2-)
(++)×72 93.5÷3÷
1125-997 998+1246+9989 (8700+870+87)÷87
125×8.8 1.3+4.25+3.7+3.75 17.15-(3.5-2.85)
3.4×99+3.4 4.8×1.01 0.4×(2.5÷73)
(1.6+1.6+1.6+1.6)×25 (+-)÷
12.3-2.45-5.7-4.55 ÷2+× 0.125×0.25×64
64.2×87+0.642×1300 78×36+7.8×741-7 ×17+×8
×+0.125×+0.5 2.42÷+4.58×-4÷3 25÷100
4.25-3-(2-1) 3.8÷3.9+3.9÷0.1+0.1÷3.9 12.1-(+)×105
-(+ )× × - ÷4
×[1÷( + )] [ -(- )]×
+ × + 1 - ÷ -
× + ÷4 5 -( ÷+ )
4-(2.5+1.9)×(0.5-0.5) 4-2.5+1.9×(0.5-0.5)
4-2.5+1.9×0.5-0.5 [4-(2.5+1.9×0.5)]-0.5
[4-(2.5+1.9) ×((0.5-0.5) [4-(2.5+1.9) ×0.5]-0.5
12-4-2-5-12.5% 0.125×+×8.25+12.5%
(+)÷ 2.5××0.4×2
15-2.25-7 ×[+(-)÷]
10×[(-0.5) ÷] (2.7-4.25×)÷2.8×
1.25+1×7.4+125%÷ 10-4.68÷7.2+0.05
1×(5÷-÷5) 18.09×[(1.5+2)÷3.75-]
0.84÷0.3÷(1.96×18.9) -(0.15+) ÷1.8 1325+540÷18×15
2.5÷8+9.5×+4×0.125 [2.1+7÷(3-1.625)] ×1
2.5×-2.1÷+9.63 (7+7×2+7)÷4 3.8+1+6.2+3
×[(4-3.5) ÷] (2+-1)×12 2.5÷8+3.5×+0.125
(9.5+9+9+9.5) ×12 3-(1+÷1)×1
[(0.05+)÷0.25-]×125% 5.35×0.25+2.65×
(3+-2)÷(1÷80%) (4.2÷0.7+6×)×
0.8×32.5×12.5 7.6×9.9×0.01 8.32×0.58-0.32×0.58
1.25÷5+0.25×20 10.69-2.5×2.4 0.3×2.5×0.04
8.4×57+8.4×42+8.4 13÷0.65÷2 7.2×10.1-7.2
1.2×2.5+2.8×2.5 32×0.65+3.2×3.5 ×÷15
25×(4+) 60×(+-) ×0.35+0.65÷
0.25×37.5%+× 25%×+×25% ÷÷
×0.35+0.65÷ ÷4÷ +÷
5÷-÷5 2-÷- ×1000-
(+)×15 ×+÷9 32÷÷
+++ +(+) ÷(3--)
×× (+)×28 ×+×
3-÷ ×÷
× + ÷11 (-)÷
()÷
()-()-() ()-()
12.06+5.07+2.94 30.34+9.76-10.34 ×3÷×3 25×7×4
34÷4÷1.7 1.25÷×0.8 17+-7 1--
,
41.06-19.72-20.28 7-3+ 8+2- 11+7+3
700÷14÷5 18.6÷2.5÷0.4 13×÷ 29÷×
5.68+(5.39+4.32) 19.68-(2.97+9.68) 7+(-) 5-(-)
1.25×(8÷0.5) 0.25×(4×1.2) 1.25×(213×0.8) 0.74÷(71×)
24×(---) (12+) ×7 (7-)× 9.3÷(4÷)
0.92×1.41+0.92×8.59 ×-× 1.3×11.6-1.6×1.3 ×11.6+18.4×
9999+999+99+9 4821-998 3.2×12.5×25 1.25×88
7.6÷0.25 3.5÷0.125 3.8×9.9+0.38 ×103-×2-
(13×8)×125 3700-2185-815 20×(17×5) 4×7×25×3
14×20×5 25×(40×32) (5×7)×80 4×9×25
8×14×125×6 16×25×5×4 259+468+741+532 23×4×5
40×7×3×5 25×6×4×5 25×(6×4) (8×6)×125
102×7.3÷5.1 3.6×0.25 2.6×9.9 1.06×2.5×4
+× -×(÷) (-)×÷
÷【×(+)】 -+÷ ÷【(-)×】
+- ×+÷ (-)×88
13—48×(+) 99× 5--0.125 45×
÷3+× +×+ ×+×+
(-)×(+) ÷7+× 【1-(+)】÷
÷+× (+-)×12 2-÷-
÷+× ×+÷ ×÷-
(-)÷ ÷(-) ×4-(+)
5--0.125
3-- ×+× ×+÷ 18×(+)
χ= χ×(+)= ×7+×5 (-)×(24-)
(×+)÷ ÷[(+)×] χ-χ= 6×-χ=
8x-×3= (x-6)×=25 x:= (32×+17)÷
(25+)÷+ ()
(21×+×21)× (99+)÷9 ×÷ ÷[(+)×]
(+)×30 +3÷ χ+= χ-χ=12
χ+10%χ=110 ×-÷ 4-- ×58+×41+
××- ×+÷ ÷[(-)÷] 5X-3×=
+X= 235 - 135÷18 ×153 – 0.6×53 (+)÷+
10 - - + χ+60%χ=28 1.6∶χ=0.125∶0.5 25×÷×
13.09-8.12-4.88 12×103-4500÷75 ×[÷(×)] (+)×15×11
37.5+19.5÷2.5×4 1.75x-0.5x=6.25 x-=×30% 6:x=:
0.8×33×1.25 ×+÷10 9.56+4.875-+1.44 ÷6-×
4.6×1+8.4÷-1×5 99.9×999+99.9 4÷1+6× 18×+2×-
2×80××1.25 25×1.25×4×8 0.7+3.9+4.3+6.1 7.35×99+7.35
47-8÷17- 46×101 15.6-2-4 14×2+14×3
÷++ ×+÷+ 3-×- --
4-3+1-2 ×+× ÷75﹪-÷ (+-)×24
0.4÷2.5+0.07×50 ÷×(+) 4-1-1.75+0.4 496+250×16
10.2-(1.25+2.5)÷1.5 (-)×45 2-[+(-)] 0.3÷[1÷(3.3-2.95)]
4949×85÷49-85 (-)×(÷) [(-)÷+]×(-)×35×
24×(+-) 3.74×4.8+6.2×3.74 ×[-(-)] 8.6÷4.3×
×(-0.25)÷ [3.6-(4.7+2.3)×]÷1.2 17.1-8.8-1.2 3.6×25
÷+ ×+÷ ÷[×(+)] 60×(+-)
1750+450÷18×32 0.8×[1÷(3.2-2.95)] (+×)÷ 2.5×3.7×0.4
12×(-) (9-10×)÷ 101.1-25.93+5.1÷0.85 (-)×(÷1)
2.6×+2× 3-1- 1.9+19.9+199.9+1999.9+0.4 ×+÷
×(+)+ ×÷(-) 1×1.25+1×2.2-1
4-÷4- ÷[(+)×] 4.8+1.2×3.5÷1.4 1.8÷0.25+8.2×4
×+÷ (10-÷)× 168.1÷(4.3×2-0.4) ×[-(-)]
25.125――17.4 0.38×7-+4× 7.83-(1.26+2.17)-0.24
×[÷(×)] (-)÷ (20.1-21×)÷5.1
24××(5×) ×÷+ 40-35.75-4.25
15×+÷16 3.64×[1÷(-2.09)] (-+)×45
2220÷37-23 6.2×4.5+3.8 ÷[×(-)]
×÷÷ 7-(0.35+2) (-)÷× 4-1÷4-×3
[-(-)]× 8.5×+0.75×5+6.5÷1 1+0.54÷0.9-0.75
24÷[(-)×3] ×(÷) (-)× ×[(+)÷]
×÷ (-)÷ ×(1-×) (5÷-)×
(1-÷)× ×+÷ (3+2+1-1)÷
7+3.25+2+5.48 64×+×34 (-÷4×)÷
15-(÷2+5) 6.4÷+1.25×3 [0.25×4-(+)]×
+(+)× ×(+)÷ 15.6÷[32×(1-)÷3.6]
× [ (1 + ) × ] [ - 0 ÷ ( + )] × 3.68 ×[1 ÷(2– 2.09 )]
[2 – (11.9- 8.4×) ] ÷1.3 × + ÷ 20 .01×83+ 1.7×200.1
(0.4×0.8)×(2.5×12.5) 1x+x= = 2.1x+7.9x=0.29
12∶7=x∶0.3 [3.2×(1-)+3]×2 1+2+4+3 ×99
3.75×4+1.6×3 1÷2.5+2.5×0.4 3-1- 13.92-(1.19+9.92)-2.81
55×66÷(11×11) 40.2-4÷80×2.4 ×[÷(×)] (+)÷(÷4-)
=:30% x--=1 = 6×3-1.8x=7.2
807×99+807 25××× 0.6+3.1+5.4+6.9 [1-(-)]×
(-)÷ 0.5×2.5×12.5×64 2X-=0.5 X+X=
2:(1-X)= 0.36:X=: -8×0.5=16 75×60%+24×+0.6
(-2)÷2 (3-112.5%+1)×1×3 7÷0.24-2×0.875
:=:x x -x =9.45 3.7×5-2x=1 3x+4=4.7
15.8-+14.2- 21.6-0.8×4÷0.8×4 3×3.7+3.6+5.3×3
+=30 1+30%=52 -37.5%=0.125 ∶12=X∶
= 5 X+3.25×4=17 1 ÷[×(1- )] (+37.5%)×48
4.67-(2.98+0.67) 46× 20×(+-) +×13
30÷(—) ×÷ 1.25∶0.25= X ∶1.6 =30%
X +X=42 ÷(+) 375+450÷18×25 1-[-(-)]
1—÷ ÷(3——) (+)÷ ×+÷9
3.6÷[ (1.2+0.6)×5] ×(-÷) 2.375++5.625+ ×(+)
×+× X ∶= ∶4 = 4X-2.5×4=1.5
-+ ÷÷9 ×56÷ (2296+7344÷36)×2.4
(+)÷+ +++ 49× ×3.8 - 3.8×
45÷0.8÷1.25 +× (+)× ÷【—(+)】
x×=18× x ××=4 4x—3 ×9 = 29 x + x = 4
×125××8 (++)×24 ×(-)÷ 3 ÷+3 ÷
7 +8.9+2 +6.1 0.36×101 17×23-23×7 20-(5.6 + 4.8)÷1.3
3.2×(2.15 + 1.95÷6.5) ( + )÷ + 36×( + -) +
(8+)× 236×(1- ) +× ××
6--- ×8.4 -× ×6 + ×6
(+)×3.6 ×+ × ÷+ ÷ 76×
X-X = X÷= 15× 40%X - =
×-÷ 1-÷-
(+×)÷ ÷[(+)×2]
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