72X99 72简便计算亠
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9*8*125*7=9*1000*7=63000
72×0.81+10.4=7.2×8.1+10.4=7.2×8+7.2×0.1+10.4=57.6+0.72+10.4=68+0.72=68.72以上回答你满意么?
72×0.81+10.4=7.2×8.1+10.4=7.2×8+7.2×0.1+10.4=57.6+0.72+10.4=68+0.72=68.72
/>72*81+10.4=72*(80+1)+10.4=72*80+72+10.4=5660+82.4=5842.4
72*0.9*0.9+10.4再问:列递式再答:0.8*0.9*0.9*0.9+0.8*13=(0.9*0.9*0.9+13)*0.8=(0.072+13)*0.8再问:不对再答:哦哦0.8*90*0
72*2.09-1.8*73.6=1.8*40*2.09-1.8*73.6=1.8*(40*2.09-73.6)=1.8*(83.6-73.6)=1.8*10=18投我一票
8×9×0.125=9
解题思路:乘法分配律运算可解:乘法分配律:a(b+c)=ab+ac;解题过程:附件
280*36+360*72=28*360+360*72=(28+72)*360=100*360=36000
44-72*12分之5=44-30=14再问:要简便计算再答:这个题只能这样计算呀
8x36+16x72=8x36+32x36=(8+32)x36=40x36=1440
77*4.8-72*4.8=(77-72)*4.8=5*4.8=24;再问:那2.25*0.16+264*0.0225+5.2*2.25+0.225*20呢?答对了再加10元再答:2.25*0.16+
72*0.81+10.4=72*(0.8+0.01)+10.4=57.6+0.72+10.4=57.6+10.4+0.72=68+0.72=68.72
72*(28+72)=72*100=7200
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
72*99=72×(100-1)=72×100-1×72=7200-72=7128
0.99换成(1-0.01)再问:下面呢再答:然后把72往里面乘再答:72-0.72懂了吗?再问:步骤可以清晰点吗?再答:再答:发图了再问:你能告诉我0.72是怎么来的吗?再答:72*0.01啊,往里
728×72÷36=(72÷36)×728=2×728=1456