1樓:手機使用者
(1)7.65-0.65×6,
=7.65-3.9,
=3.75;
(2)9.43-1.68-4.32,
=9.43-(1.68+4.32),
=9.43-6,
=3.43;
(3)1.25×0.76×0.8,
=(1.25×0.8)×0.76,
=1×0.76,
=0.76;
(4)0.32×7.5-0.32×4.5,=0.32×(7.5-4.5),
=0.32×3,
=0.96;
(5)3.8×10.1,
=3.8×(10+0.1),
=38+0.38,
=38.38;
(6)9.9÷[16.5-(1.7+3.8)],=9.9÷[16.5-5.5],
=9.9÷11,
=0.9.
計算下面各題,能簡算的要簡算,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0
2樓:褲兜最棒
(1)9.06-2.68-0.32,
=9.06-(2.68+0.32),
=9.06-3,
=6.06;
(2)(3.06÷0.25+2.76)×
0.2,
=(12.24+2.76)×0.2,
=15×0.2,
=3;(3)18-(3
5+4÷25),
=18-(0.6+4×52),
=18-(0.6+10),
=18-10.6,
=7.4;
(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,
=(2.7+5.3)×1.25,
=8×1.25,
=10.
計算下面各題,能簡算的要簡算.9.5×1.06-2.52÷2.43.4×0.26+0.74×3.4 1.25×32×0.87.09×99+7.0968.
3樓:手機使用者
(1)9.5×1.06-2.52÷2.4
=10.07-1.05
=9.02;
(2)3.4×0.26+0.74×3.4
=3.4×(0.26+0.74)
=3.4×1
=3.4;
(3)1.25×32×0.8
=(1.25×0.8)×32
=1×32
=32;
(4)7.09×99+7.09
=7.09×(99+1)
=7.09×100
=709;
(5)68.5+31.5÷(0.29+0.41)=68.5+31.5÷0.7
=68.5+45
=113.5;
(6)0.4×5÷0.4×5
=2÷0.4×5
=5×5
=25.
計算下面各題,能簡算的要簡算1.25×0.7×0.8 &nb...
4樓:樂事疊合呼
首先要觀察有沒有共同項,有的話就用結合定律,有時候也可以把數拆分來找規律的,回沒有的話一定會有特答俗的運算,比如125x8、25x4等等。一般都是有規律的,還需要平時多多積累。
(1)1.25×0.7×0.8
=(1.25×0.8)×0.7
=1×0.7
=0.7
(2)0.65×202
=0.65×(200+2)
=0.65×200+0.65×2
=130+1.3
=131.3
(3)1.25+4.6+0.75
=(1.25+0.75)+4.6
=2+4.6
=6.6
(4)6.1×3.6+3.6×3.9
=(6.1+3.9)×3.6
=10×3.6
=36(5)16.8÷(7.34-6.54)=16.8÷0.8
=21(6)2.7÷1.25÷8
=2.7÷(1.25×8)
=2.7÷10
=0.27
5樓:匿名使用者
=1 x 0.7
=0.7
(1.25 x 0.8 = 1000 x 0.001)
6樓:手機使用者
(1)1.25×
0.7×0.8
=(du1.25×0.8)zhi×0.7
=1×0.7
=0.7
(2)0.65×202
=0.65×(200+2)
=0.65×200+0.65×2
=130+1.3
=131.3
(3)1.25+4.6+0.75
=(1.25+0.75)+4.6
=2+4.6
=6.6
(4)6.1×3.6+3.6×3.9
=(6.1+3.9)×3.6
=10×3.6
=36(5)16.8÷dao(7.34-6.54)=16.8÷0.8
=21(6)2.7÷1.25÷8
=2.7÷(1.25×8)
=2.7÷10
=0.27
7樓:夜依舊清
1.25*0.7*0.8=1.25*.0.8*0.7=1*0.7=0.7
計算下面各題,能簡算的要簡算
8樓:du知道君
2.5×
32×12.5 =(2.5×4)×(8×12.
5) =10×100 =1000 7/9÷11/5+2/9×5/11 =7/9×5/11+2/9×5/11 =(7/9+2/9)×5/11 =1×5/11 =5/11 3/5÷【(1/5+1/3)÷2/9】專 =3/5÷【8/15÷2/9】 =3/5÷12/5 =1/4 678-192÷8×12 =678-24×12 =678-288 =390 8×(7/8-5/9)×9 =8×7/8×9-8×5/9×9 =63-40 =23 2.解方屬程或解比例。 3/4x+x=1.
4 解:1.75x=1.
4 x=1.4÷1.75 x=0.8
計算下面各題,能簡算的要簡算. 7×125×8 120-20×2+45 35×(32+128÷32) 43×36+36×57 6
9樓:魯步陽冰
(1)7×125×8
=7×(125×8)
=7×1000
=7000;
(2)120-20×2+45
=120-40+45
=80+45
=125;
(3)35×(32+128÷32)
=35×(32+4)
=35×36
=1260;
(4)43×36+36×57
=(43+57)×36
=100×36
=3600;
(5)640÷[4×(16-8)]
=640÷[4×8]
=640÷32
=20;
(6)68×101-68
=68×(101-1)
=68×100
=6800.
計算下列各題,能簡算的要簡算3/4-1/6+4/9等於多少?
10樓:義明智
分數計算
3/4-1/6+4/9
=27/36-6/36+16/36
=37/36
計算下面各題能簡算的要簡算。
簡便計算過程方法如下 解 10.7 0.2 1.9 8.62 10.7 0.38 8.62 10.7 0.38 8.62 10.7 9 1.7 原式 10.7 0.38 8.62 10.7 0.38 8.62 10.7 9 1.7 希望採納,謝謝 原式 10.7 0.38 8.62 10.7 9 1...
計算下面各題,能簡算的要簡算
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計算下面各題(能簡算的要簡算)
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