1樓:紅星老萬
2.88÷0.48+0.7x5
=6+3.5
=9.5
1/27x3/5÷(7/20-1/5)
=1/27x3/5÷3/20
=1/27x3/5x20/3
=4/27
42x5/7÷42x5/7(脫式計算,能簡算的要簡算)
2樓:廣可欣羿婷
42x[(129-31)÷14]用簡算
解:直接運算最簡便,
原式=42x[98÷14]
=42x7
=294
3樓:李儒興
=42÷42x5/7x5/7
=1x5/7x5/7
=25/49
4樓:匿名使用者
(382x26分之
du7+0.618x26分之
zhi7)x3又7分之5=(382*7/26+0.618*7/26)dao*26/7=382+0.618=382.
6185分之版4+25分之3x21分之5+5分之3x2=4/5+3/25*5/21+3/5*2=4/5+1/35+6/5=28/35+1/35+42/35=71/35333x332332332-332x333333333=333x333333333-333*1001001-(333x333333333-333333333)=-333*1001001+333333333=0(0.4+3分之1)÷(權0.4-3分之1)x0.
1=(3*0.4+1)/(3*0.4-1)*0.
1=2.2/0.2*0.
1=1.12分之1x3分之1+3分之1x4分之1+4分之1x5分之1+......+99分之1x100分之1=1/2*1/3+1/3*1/4+1/4*1/5+1/99*1/100=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+..+(1/99-1/100)=1/2-1/100=49/100
請脫式計算,能簡算的要簡算4.85+3.62+1.38+5.15 [16.7-(6.2+9.5)]×8.3 3.25÷0.25+1.75÷0.25
5樓:嚼咬
(1)4.85+3.62+1.38+5.15,du=(zhi4.85+5.15)+(3.62+1.38),dao專=10+5,
=15;
(2)[16.7-(6.2+9.5)]×8.3,=[16.7-15.7]×8.3,
=1×8.3,
=8.3;
(3)3.25÷
屬0.25+1.75÷0.25,
=13+7,
=20;
(4)10.52-(3.52-1.7),
=10.52-3.52+1.7,
=7+1.7,
=8.7.
脫式計算,能簡算的要簡算.7.32-(3.8+1.32) 95.6×18-9535×8 (1-16×37)÷56 1.5÷〔1.2-(0.
6樓:手機使用者
(1)7.32-(3.8+1.32),
=7.32-1.32-3.8,
=6-3.8,
=2.2;
(2)95.6×18-953
5×8,
=95.6×18-190.6×8
=1720.8-1524.8,
=196;
(3)(1-16×3
7)÷56
,=(1-1
14)÷56,
=1314×65
,=3935;
(4)1.5÷[1.2-(0.4+0.5)],=1.5÷[1.2-0.9],
=1.5÷0.3,
=5;(5)0.125×2+6.6÷8-12.5%,=0.125×2+6.6×0.125-0.125,=0.125×(2+6.6-1),
=0.125×7.6,
=0.125×8×0.95,
=1×0.95,
=0.95;
(6)6.7×0.25+9.3÷4,
=6.7×0.25+9.3×14,
=(6.7+9.3)×14
,=16×14,=4.
脫式計算(能簡算的要簡算
7樓:軒胤
(1)6.72-2.3÷0.5×0.8
=6.72-4.6×0.8
=6.72-3.68
=3.04;
(2)98-1
7+18-6
7=(98+1
8)-(17+6
7)=54
-1=14;
(3)9
10÷[1
2×(65-3
10)]
=910
÷[12
×910]=9
10÷9
20=2;
(4)(27+1
5)×7×5=27
×7×5+1
5×7×5
=10+7
=17.
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