1樓:匿名使用者
1.25×8+1.25×0.8
2樓:匿名使用者
1.25乘(8+0.8)
遞等式計算(能簡便的最好要簡便計算):8.8×1.25×0.2 ...
3樓:王者
(1)8.8×1.25×0.2
=8×1.1×1.25×0.2
=(8×1.25)×(0.2×1.1)
=10×0.22
=2.2
(2)1.01×6.7
=1×6.7+0.01×6.7
=6.7+0.067
=6.767
(3)4.8×(
11.8-15.6÷2.5)
=4.8×(11.8-6.24)
=4.8×5.56
=26.688
(4)5.3×5.3+5.3×4.7
=5.3×(5.3+4.7)
=5.3×10
=53(5)1.7÷3.4×(0.9+1.2)=1.7÷3.4×2.1
=0.5×2.1
=1.05
(6)7.28-4.4-2.2+6.72
=(7.28+6.72)-(4.4+2.2)=14-6.6
=7.4
9×1.25×8.8用簡便運算怎麼做?用脫式計算寫出來。
4樓:天雨下凡
=9×1.25×8×1.1
=9×1.1×1.25×8
=9.9×10=99
5樓:愛笑的水星人
9×1.25×8.8
=9×(1.25x8)×1.1
=9.9x10=99
8.8x1.25遞等式計算能簡便。
6樓:空夜的星
1.25*8*1.1=10*1.1=11
7樓:長瀨綿秋
(1)7/8÷3/4+7/8x2/3
=7/8x4/3+7/8x2/3
=7/8x(4/3+2/3)
=7/8x2
=7/4
(2)0.45×1/6÷0.45x1/6
=(0.45÷0.45)x(1/6x1/6)=1x1/36
=1/36
(3)4.8÷5/13-4又4/5x1.6=4.8x13/5-4.8x8/5
=4.8x(13/5-8/5)
=4.8x1
=4.8
脫式計算(能簡便的要簡便計算) 4.5×5.2+4.5×4.8 8.8×1.25 0.4×(4.3×2.5) 60.8-1.7
8樓:手機使用者
(1)4.5×
5.2+4.5×4.8
=4.5×(5.2+4.8)
=4.5×10
=45;
(2)8.8×1.25
=(8+0.8)×1.25
=8×1.25+0.8×1.25
=10+1
=11;
(3)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(4)60.8-1.75-1.25
=60.8-(1.75+1.25)
=60.8-3
=57.8;
(5)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(6)45×10.1
=45×(10+0.1)
=45×10+45×0.1
=450+4.5
=454.5;
(7)0.63+0.42+0.37+9.58=(0.63+0.37)+(0.42+9.58)=1+10
=11;
(8)8.36×99+8.36
=8.36×(99+1)
=8.36×100
=836;
(9)0.78×99
=0.78×(100-1)
=0.78×100-0.78×1
=78-0.78
=77.22;
(10)90÷(3.6-1.8)
=90÷1.8
=50;
(11)36÷[(6.1-4.6)×0.8]=36÷[1.5×0.8]
=36÷1.2
=30;
(12)1.6×(2.25+10.5÷1.5)=1.6×(2.25+7)
=1.6×9.25
=14.8;
(13)12.75÷[14.6-(1.3+8.2)]=12.75÷[14.6-9.5]
=12.75÷5.1
=2.5;
(14)3.2+3.91÷(19-16.7)=3.2+3.91÷2.3
=3.2+1.7
=4.9.
遞等式計算。能簡便要簡便
解1 7 31 bai13 13 31 20 7 du13 31 13 20 31 13 31 7 20 13 31 27 13 27 31 351 31 解2 2 11 11 44 3 5 zhi1 25 2 11 55 3 5 25 2 5 3 5 10 15 25解3 6又dao1 2 3又3...
用遞等式計算,能簡便的要簡便計算
1 200 5.2 du30 200 156 44 zhi2 3.8 dao3.5 6.2 3.5 3.8 6.2 內3.5 10 3.5 35 3 9 101 9 100 1 9 100 9 900 9 909 4 4.536 容0.8 14 5.67 14 0.405 用遞等式計算,能簡便的要簡...
用遞等式計算，能簡便計算的要簡便計算0
1 0.125 0.5 0.8，0.125 0.8 0.5，0.1 0.5，0.05 2 60.4 0.8 12.8，48.32 12.8，35.52 3 2.8 0.6 0.35，2.8 0.21，3.01 4 0.2 2.5，0.2 4 2.5 4 0.8 10，0.08 5 104 0.45，...