1樓:妙酒
簡便計算
19.2-7/4-5.2+3/4
=(19.2-5.2)-(7/4-3/4)=14-1=13
計算下面各題,能簡算的要簡算1/2+4/7+3/7 1/10+3/8-2/5 1-(2/3+1/8) 7/8-(2/3-1/4) 1/9+(1/6+2/9)+5/6
2樓:新野旁觀者
計算下面各題,能簡算的要簡算
1/2+4/7+3/7
=1/2+(4/7+3/7)
=1/2+1
=1又1/2
1/10+3/8-2/5
=19/40-2/5
=3/40
1-(2/3+1/8)
=1-2/3-1/8
=1/3-1/8
=5/24
7/8-(2/3-1/4)
=7/8+1/4-2/3
=9/8-2/3
=11/24
1/9+(1/6+2/9)+5/6
=(1/9+2/9)+(1/6+5/6)
=1/3+1
=1又1/3
計算下面各題,能簡便計算的要簡便計算。 3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4 = = = = = =
3樓:吃葷的兔子
3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4
=36/60+45/60-50/60 =8/9+1 =15/8-1
=31/60 =17/9 =7/8
9/7-1/6+3/7 7/4-12/23-3/4 5-6(3/8+1/6)
= 12/7-1/6 = 1-12/23 =5-(9/4+1)
= 72/42-7/42 =11/23 =7/4
=65/42
計算下面各題,能簡算的要簡算
4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 3/1+7/2—4/1 5/4—(15/2+9/1) 5/3+3/1
5樓:凌月霜丶
3/1+7/2—4/1
1/3-1/4+2/7
=28/84-21/84+12/84
=19/84答
計算下面各題,能簡算的要簡算1/2+4/7+3/7 1/10+3/8-2/5 1-(2/3+1/8) 2 7/8-(2/3-1/4) 1/9+(1/6+2/9)+5/6
6樓:紫色學習
1/2+4/7+3/7
=1/2+1
=1又1/2
1/9+(1/6+2/9)+5/6
=(1/9+2/9)+(1/6+5/6)
=1/3+1
=1又1/3
蘋果數減去3後是4和6的公倍數。4、6的最小公倍數是24所以蘋果數最少是24+3=27(個)
計算下面各題，能簡算的要簡算。
15 1 15 3 4 的簡便演算法如下 先計算15 1 15，再減去3 4 所以有1 3 4 1 4 首先算15x 15得1再減去3 4等於1 4回答完畢望採納謝謝！15 1 15 3 4 1 3 4 1 4 計算下面各題,能簡算的要簡算 2.5 32 12.5 2.5 4 8 12.5 10 1...
計算下面各題，能簡算的要簡算，計算下面各題能簡算的要簡算。 19 2 7 4 5 2 3 4？
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 3 5 8 15 2 9 3 5 12 5 1 4 678 192 8 ...
計算下面各題，能簡算的要簡算0 6 3
1 0.6 3.3 3 5 7.7 0.6，0.6 3.3 0.6 7.7 0.6，3.3 7.7 1 0.6，10 0.6，6 2 2 3 5 7 1 2 142 2 3 5 7 1 2 42，2 3 42 5 7 42 1 2 42，28 30 21，37 3 9 10 5 9 1 2 1 6 ...