1.8÷2.4×4.6简便计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/20 15:50:20
50÷2.5+1.8×4.5=5*10/2.5+(2.0-0.2)*4.5=5*4+9-0.9=29-0.9=28.1
4.6×102=4.6×(100+2)=4.6×100+4.6×2=460+9.2=469.2
2.4/0.25=(2.4*4)/(0.25*4)=9.6/1=9.6
4.8*2.4+10.52=4.8*(2+0.4)+10.52=9.6+1.92+10.52=22.0410.52不好拆啊.
①1.8×[﹙4.6+2.4﹚÷0.35]=1.8x7/0.35=1.8x700/35=1.8x20=36②0.36×98+3.6×0.2=3.6x9.8+3.6x0.2=3.6x(9.8+0.2)=
9.6*1.5/2.4=(9.6/2.4)*1.5=4*1.5=68.1/1.8=(0.9*9)/(0.9*2)=9/2=4.55.6/3.5=(0.7*8)/(0.7*5)=8/5=1.6
1.25+0.75+4.61+4.65.6再问:2.02乘8.5呢
=6.3-6.3=0
4.6x101=4.6x(100+1)=4.6x100+4.6=460+4.6=464.6
19.43-4.6+3.4=19.43-(4.6-3.4)=19.43-1.2=18.2314.8-9.99=14.8-10+0.01=4.8+0.01=4.81
解题思路:化简小括号后,变为依次大1/2的等差数列。问题可求。解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prced
直接算啊90÷(3.6-1.8)=90/1.8=900/18=50再问:怎您一问题,甲,乙两数的和是252.5,甲数的小数点向右移动两位正好等于乙数。甲数是多少?再答:设甲数x,乙数100x100x+
2×4.5-0.2×4.5
37.6-12÷2.4=37.6-120÷24=37.6-5=32.63.9×1.4÷0.35=3.9×140÷35=3.9×4=15.619.44÷2.5÷0.4=19.44÷(2.5x0.4)=1
7.6-1.8+2.4-8.2 = 7.6 +2.4-1.8-8.2 = (7.6 +2.4)-(1.8+8.2)=10-10=0
0.98*4.6=(1-0.02)×4.6=4.6×1-0.02×4.6=4.6-0.092=4.508
320÷25=320×4÷(25×4)=1280÷100=12.816×45=8×(45×2)=8×90=720
19.6/(9.8/0.4)=19.6*0.4/9.8=2*0.4=0.86.3/1.8=7*0.9/2*0.9=7/2=3.5
2.4/0.12*6.6=132