2.54×1.7-0.7×25.4简便计算? 25.4×7.9-1.54×79用简便计算怎么算写出过程?
1.75\u00d70.25\u00d70.4\u7b80\u4fbf\u8ba1\u7b97\u5bd2\u6a31\u6696\u6696\u4e3a\u4f60
\u539f\u5f0f
=1.75\u00d7\uff080.25\u00d70.4\uff09
=1.75\u00d70.1
=0.175
\uff08\u6216\u5728\u5ba2\u6237\u7aef\u53f3\u4e0a\u89d2\u8bc4\u4ef7\u70b9\u3010\u6ee1\u610f\u3011\uff09
\u662f\u6211\u524d\u8fdb\u7684\u52a8\u529b!
\u5982\u6709\u4e0d\u660e\u767d,
\u76f4\u5230\u5b8c\u6210\u5f04\u61c2\u6b64\u9898!
25.4x7.9\uff0d1.54x79
=2.54x79\uff0d1.54x79
=\uff082.54\uff0d1.54\uff09x79
=1x79
=79
2.54×1.7-0.7×25.4 第二个式子转换成7×2.54
=2.54×1.7—7×2.54
=2.54×(1.7—7) 提取共项2.54
=2.54× (—5.3)
=—13.462
验算见截图
把25.4分解成2.54×10 再提取它们相同的公因数2.54
=2.54×1.7-0.7×2.54×10
=2.54×(1.7-0.7×10)
=2.54×(1.7-7)
=2.54×(-6.3)
=16.002
该题须用乘法交换律与结合律共同解决,如题:
原式=2.54×1.7-7×2.54
=2.54×(1.7-7)
=2.54×(-5.3)
=2.54×(-5)-2.54×0.3
=-12.7-0.75-0.12=-13.57。
先将2.54化成25.4X0.1或将25.4化成2.54x10则有:25.4x0.1x1.7-0.7X25.4
=25.4 x(0.17-0.7)此题是出错了吧
4x(07一)
利用拼凑法,乘法分配律
2.54×1.7-0.7×25.4
=25.4×0.17-0.7×25.4
=25.4×(0.17-0.7)
=25.4×(-0.53)
=-13.462
绛旓細2.54脳1.7锛0.7脳25.4 绗簩涓紡瀛愯浆鎹㈡垚7脳2.54=2.54脳1.7鈥7脳2.54=2.54脳锛1.7鈥7锛 鎻愬彇鍏遍」2.54=2.54脳 (鈥5.3)=鈥13.462楠岀畻瑙佹埅鍥
绛旓細0.75+0.25/0.1 =0.75+2.5 =3.25(杩欓鐩存帴绠楀氨琛屼簡)42/3.5 =42*2/(3.5*2)=42/7*2 =12 (7.2-0.4)*25 =1.8*4*25-0.4*25 =180-10 =170 3.6-36*0.8 =3.6*(1-8)=-25.2 3.75*0.5+6.25/2 =3.75/2+6.25/2 =(3.75+6.25 )/2 =10/2 =5 6...
绛旓細灞曞紑鍏ㄩ儴 138-89= 5400梅54= 200脳34= 550-450= 18000梅600= 2700梅30=45脳14= 18涓+24涓= 89梅100= 0.82+0.08= 73脳1= 0.63脳10= 4梅10= 17梅1000= 0.56+0.4= 80脳25= 1-0.93= 1.25脳100= 5.6+99= 100梅25= 90-0.9= 41脳100= 8800梅400= 0.12脳10= 600梅30= 7.59梅100= 150+70...
绛旓細2.5脳(3.8脳0.04) 7.69脳101 3.8脳10.1 0.25脳39+0.25 0.125脳72 46脳0.33+54脳0.33 (8脳5.27) 脳1.25 6.81+6.81脳99 0.25脳185脳40 6.8脳0.75梅0.5 3.75梅0.125鈥2.75 1.53+23.4梅7.2 9.5脳99 13.5脳0.98 12.5脳8...
绛旓細2004-05 绾界害灏煎厠鏂 76 5 19.4 44.9% 10% 73.7% 1.7 2.8 4.5 0.8 0.61 0.21 1.34 2.74 7.0 2005-06 绾界害灏煎厠鏂 72 35 15.5 37.4% 100% 78.1% 1.2 2.4 3.6 0.9 0.60 0.19 1.11 2.01 4.4 2006-07 绾界害灏煎厠鏂 65 2 12.5 39.8% 25% 80.8% 0.7 2.0 2.7 1.0 0.40 0.14 1.00 1.85 3.0 NBA甯歌璧涘钩...
绛旓細鍕掑竷鏈椔疯┕濮嗘柉锛1984骞12鏈30鏃ュ嚭鐢熷湪缇庡浗路淇勪亥淇勫窞路鍏嬮噷澶叞锛岀編鍥界敺瀛愯亴涓氱鐞冭繍鍔ㄥ憳锛屽徃鑱屽皬鍓嶉攱锛岀幇鏁堝姏浜庡厠鍒╁か鍏伴獞澹槦銆傚嫆甯冩湕路瑭瑰鏂湪2003骞寸殑NBA閫夌澶т細涓紝棣栬疆绗竴椤轰綅琚厠鍒╁か鍏伴獞澹槦閫変腑銆2003-2010骞达紝瑭瑰鏂湪楠戝+闃熸晥鍔7骞达紝鏈熼棿鑾峰緱涓ゅ眾NBA鏈鏈変环鍊肩悆鍛橈紙MVP锛夈2010骞磋浆浼氳嚦杩堥樋瀵嗙儹鐏...
绛旓細浼戞柉椤跨伀绠 7 7 40.0 39.4% 25% 73.7% 0.7 5.1 5.9 7.3 0.71 0.86 3.00 1.71 25.3 宸茶禐杩 宸茶俯杩< 浣犲杩欎釜鍥炵瓟鐨勮瘎浠锋槸? 璇勮 鏀惰捣 鍙跺叕濂界墰 2007-07-16 路 TA鑾峰緱瓒呰繃478涓禐 鐭ラ亾灏忔湁寤烘爲绛斾富 鍥炵瓟閲:220 閲囩撼鐜:0% 甯姪鐨勪汉:107涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 濮撳悕...
绛旓細宸村反鍗÷峰崱椹媺 鍚夋灄 20 11.4 0-1(0%) 46(56%) 8.95 2.85 6.1 1.05 0.7 0.65 1.1 1.25 3.5 16.9 鐜嬪媷 涓婃捣 23 11.3 25-70(35%) 44(81%) 4.34 1.60 2.73 1.34 1.26 0.26 0.26 1.26 2.26 11.8 鏉滈攱 瀹忚繙 33 11.2 51-143(35%) 33(75%) 4.18 1.42 2.75 1.90 0.54 0.06 0.12 1.66 3.21 10.4 ...
绛旓細07-08 鍥界帇 15 12 31.5 0.406 0.393 0.742 0.7 3.0 3.7 5.0 1.3 0.1 2.53 2.3 13.5 07-08 鑰侀拱 33 32 33.3 0.414 0.369 0.797 0.2 3.0 3.2 6.5 1.1 0.1 2.45 1.9 14.1 鑱屼笟鐢熸动 723 719 36.2 0.439 0.371 0.806 0.6 2.7 3.3 6.2 1.3 0.1 2.48 1.9 16.6瀛e悗璧:璧涘 鐞冮槦 鍑哄満 鏃堕棿 鎶曠 涓夊垎 缃...
绛旓細5.6+2.3+0.7= 8800梅800= 110脳600= 25脳6= 30脳270= 90梅15= 175鈥75= 57浜+13浜=61涓-25涓= 1144梅102=320鈥168= 40脳23脳5= 9脳125脳8= 430鈥270= 376-198= 2.5+3.2= 9.9鈥4.8= 8鈥0.72= 0.25+0.75= 38脳19梅38= 780梅30= 25脳4= 400脳5=12脳200= 60脳25= 300脳15= 900梅...