1樓:新野旁觀者
4/7+1/14-1/2
=8/14+1/14-7/14
=2/14
=1/7
5/3-3/8-5/8
=5/3-(3/8+5/8)
=5/3-1
=2/3
3/5+3/11+7/5+11
=(3/5+7/5)+11+3/11
=2+11+2/11
=13又2/11
3/4-{5/6-1/3}
=3/4-(5/6-2/6)
=3/4-1/2
=3/4-2/4
=1/4
3/4+1/5=4/5 3/4-1/5=11/20 5/6+2/9=19/18 5/6-2/9=11/18 2/3+3/5=19/15
2/3-3/5=1/15 6/7+1/2=19/14 6/7-1/2=5/14 2/3+1/6=5/6 1/3+1/4=7/12
1/3-1/4=1/12 1/5+1/7=12/35 1/5-1/7=2/35 1/4+1/9=13/36 1/4-1/9=5/36
1/8+1/9=17/72 1/8-1/9=1/72 1/10+7/9=79/90 5/7-1/6=23/42 1-5/9=4/9
1/5+3/8=23/40 3/4+1/5=19/20 2/3-3/5=1/5 1-2/5=3/5 5/8-1/9=37/72
1/10-1/20=1/20 1/6+3/8=13/24 5/9-1/2=1/18 2/3+1/4=11/12 1/2+1/3=5/6
5/6+1/18=8/9 3/5-1/3=4/15 17/15-1/3=4/5 11/12-2/3=1/4 1/2-1/4=1/4
1/7-1/8=1/56 1/3-1/9=2/9 5/6-1/2=1/3 1-2/3=1/3 5/8-1/6=11/24
1/3+1/6=1/2 3/4-1/2=1/4 1/5+1/8=13/40 5/6+4/9=23/18 5/9-2/5=7/45
3/7+5/2=41/14 5/8+9/10=61/40 11/12-8/15=23/60 1/4+1/6=5/12 1/4-1/6=1/12
1-6/7=1/7 11/12-2/3=1/4 3/10+2/5=7/10 7/8-1/4=5/8 3/4+5/12=7/6
3/5-3/7=6/35 5/4-5/12=5/6 1/5-1/9=4/45 1/3-1/8=5/24 11/6-2/9=29/18
1/5+1/9=14/45 1-2/5=3/5 7/4+1/7=53/28 1-1/9=8/9 2/3-2/7=8/21
5/6+1/2=4/3 4/3-3/4=7/12 1-4/7=3/7 4/3+3/2=17/6 5/9+18/5=5/6
3/8+7/10+5/8=17/10 7/8-(1/8+3/4)=0 4/7+1/6-4/7=1/6
2-7/9-2/9=1 3/5+7/8+2/5=15/8 7/9-(1/9+1/3)=1/3
1/4+(2/5+3/4)=7/5 5/6-3/10+1/6-7/10=0 3/4+1/6-2/3=1/4
7/8-1/4+4/9=77/72 1-1/3+2/7=20/21 1/2+4/5-3/10=1
5/6-(2/3-1/9)=5/18 9/10-(3/4+1/8)=1/40 1/2+2/3-3/4=5/12
7/8-1/6+1/4=23/24 1-(3/4-2/9)=17/36 9/10-1/5-1/2=1/5
1/4+3/7+1/2=33/28 7/8-(2/3+1/6)=1/24 1-(1/3+3/5)=1/15
1/2+1/4+1/3=13/12 7/8+1/4+1/2=5/8 5/7-(4/7+1/9)=2/63
1-1/4-1/2=1/4 3/4-1/6-1/3=1/4 3/10+1/4+2/5=19/20
2/3+1/6+1/12=11/12 1-1/4-2/5=7/20 1/2+1/9+1/12=25/36
2樓:林林林
5/4-(2/1+4/1)
=20/16-(20/10+20/5)
=20/16-20/15
=20/1
急求200道五年級分數或簡便運算題
3樓:夏傷
一、口算下面各題。(23分) 10-2.65= 0.
9×0.08= 528-349= 6+14.4= 24÷0.
04= 12.34-2.3= 0÷3.
8= 0.77+0.33= 7÷1.
4= 67.5+0.25=7.
2÷8×4= 5-1.4-1.6= 400÷125÷8= 1.
9×4×0.5= 80×0.125= 3× = 6 6= 2 -( + )= 10 2= 3.
2×7÷3.2×7= ( - )×12= 187.7×11-187.
7= 1- 62.5%= 二、寫出下列每題在簡便運算時所運用的定律或性質(12分) 4 +3.2+5 +6.
8 25×(8×0.4)×1.25 7 -(2 - ) ( ) ( ) ( ) (+ + )×72 93.
5÷3 16÷2.5 ( ) ( ) ( ) 三、用簡便方法計算。(65分) 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 -43 25÷100 4.25-3 -(2 -1 ) (1)1.25*17.
6+36.1/0.8+2.
36*12.5 (2)7.5*2.
3+1.9*2.5 (3)2004/2003*2005 (4)276*543-267/276+543*275 (5)17/51+ (68/1+51/2)*17 (6)(3.
25-0.8*8/5)/(6又4/1-3.5) 1)五十二又二十五分之十一×79.
45+159×47.56+七十九又二十分之十一×52.44 =52.
44×79.45+159×47.56+79.
55×52.44 =52.44×(79.
45+79.55)+159×47.56 =52.
44×159+159×47.56 =159×(52.44+47.
56) =159×100 =15900 3)2002+2001-2000-1999+1998+1997-1996-1995+……+2+1 4)(1×2分之一)+(2×3分之一)+(3×4分之一)+……+(10×11分之一) 5)三分之一+十五分之一+三十五分之一+六十三分之一+九十九分之一 6)一又二分之一-六分之五+十二分之七-二十分之九+三十分之十一-四十二分之十三+五十六分之十五 (提示,1又1/2=1+1/2,+1/2+1/3=5/6……)
麻煩採納,謝謝!
五年級小數簡便運算
小學五年級,簡便抄小數運算有 4.8 8.63 5.2 0.37 5.93 0.19 2.81 1.76 0.195 3.24 2.35 1.713 0.287 7.650.134 2.66 0.866 1.27 3.9 0.73 16.1 7.5 襲4.9 bai6.5 3.07 0.38 1.6...
五年級分數加減法混合運算,五年級分數加減法混合運算
6 5 3 1 2 1 1 18 11 3 1 2 1 18 14 24 17 3 1 2 1 24 21 12 5 24 5 4 1 24 9 3 2 24 5 4 1 24 15 2 1 24 5 4 1 24 11 6 5 4 1 2 1 12 2 3 1 4 1 2 1 12 1 10 3 ...
五年級下口算2019道,五年級下口算2000道
17 40 100 63 3.2 1.68 2.8 0.4 14 7.4 1.92 0.04 0.32 500 0.65 4.35 10 5.4 4 20 3.5 200 1.5 0.06 0.75 15 0.4 0.8 4 0.25 0.36 1.54 1.01 99 420 35 25 12 1...