6比3和8比5,0.2比2.5和,4比50,二分之比4分之一和,4比2,哪个能成比例,为什么？ 0.5:0.2的比值是()8分之5:4分之1的比值是(),因...
\u5e94\u7528\u6bd4\u4f8b\u7684\u57fa\u672c\u6027\u8d28 \u5224\u65ad\u4e0b\u9762\u54ea\u7ec4\u6570\u4e2d\u7684\u4e24\u4e2a\u6bd4\u53ef\u4ee5\u7ec4\u6210\u6bd4\u4f8b 6:3\u548c8:5 0.\uff1a2:2.5\u548c4:50 \u4e09\u5206\u4e4b\u4e00\uff1a\u516d\u5206\u4e4b\u4e006\u00d75=30 3\u00d78=24 6:3\u548c8:5 \u4e0d\u80fd\u7ec4\u6210\u6bd4\u4f8b
0.2\u00d750=10 2.5\u00d74=10 0.2:2.5\u548c4:50 \u80fd\u7ec4\u6210\u6bd4\u4f8b
1/3\u00d71/4=1/12 1/6\u00d71/2=1/12 \u4e09\u5206\u4e4b\u4e00\uff1a\u516d\u5206\u4e4b\u4e00\u548c\u4e8c\u5206\u4e4b\u4e00\uff1a\u56db\u5206\u4e4b\u4e00 \u80fd\u7ec4\u6210\u6bd4\u4f8b
1.2\u00d75=6 3/4\u00d74/5=3/5 1.2\uff1a\u56db\u5206\u4e4b\u4e09\u548c\u4e94\u5206\u4e4b\u56db\uff1a5 \u4e0d\u80fd\u7ec4\u6210\u6bd4\u4f8b
0.5:0.2\u7684\u6bd4\u503c\u662f()8\u5206\u4e4b5:4\u5206\u4e4b1\u7684\u6bd4\u503c\u662f(),\u56e0\u4e3a\u6bd4\u503c\u76f8\u7b49,\u6240\u4ee5\u53ef\u4ee5\u7ec4\u6210\u6bd4\u4f8b(
\u7b54\u6848\uff1a0.5:0.2\u7684\u6bd4\u503c\u662f(2\u5206\u4e4b5)\uff0c8\u5206\u4e4b5:4\u5206\u4e4b1\u7684\u6bd4\u503c\u662f(2\u5206\u4e4b5)\uff0c\u56e0\u4e3a\u6bd4\u503c\u76f8\u7b49\uff0c\u6240\u4ee5\u53ef\u4ee5\u7ec4\u6210\u6bd4\u4f8b(0.5:0.2=8\u5206\u4e4b5:4\u5206\u4e4b1\uff09
6：3=2，8：5=1.6，不能组成比例
0.2：2.5=2/25，4：50=2/25，能组成比例，即0.2：2.5=4：50
1/2：1/4=2，4：2=2，能组成比例，即1/2：1/4=4：2
绛旓細姣斿肩浉绛夌殑姣旇兘缁勬垚姣斾緥銆6锛3=2锛8锛5=1.6锛屼笉鑳界粍鎴愭瘮渚 0.2锛2.5=2/25锛4锛50=2/25锛岃兘缁勬垚姣斾緥锛屽嵆0.2锛2.5=4锛50 1/2锛1/4=2锛4锛2=2锛岃兘缁勬垚姣斾緥锛屽嵆1/2锛1/4=4锛2
绛旓細6脳5=30 3脳8=24 6:3鍜8:5 涓嶈兘缁勬垚姣斾緥 0.2脳50=10 2.5脳4=10 0.2:2.5鍜4:50 鑳界粍鎴愭瘮渚 1/3脳1/4=1/12 1/6脳1/2=1/12 涓夊垎涔嬩竴锛鍏鍒嗕箣涓鍜屼簩鍒嗕箣涓锛氬洓鍒嗕箣涓 鑳界粍鎴愭瘮渚 1.2脳5=6 3/4脳4/5=3/5 1.2锛氬洓鍒嗕箣涓夊拰浜鍒嗕箣鍥涳細5 涓...
绛旓細姣斿氨鏄櫎娉,灏辨槸鍒嗘暟姣斿煎氨鏄晢灏辨槸鍒嗘暟鍊煎6锛3=6闄や互3=3鍒嗕箣6,閮界瓑浜2 姣斾緥灏辨槸鐢ㄧ瓑鍙疯繛鎺ヤ袱涓肩浉绛夌殑姣旀垨闄ゆ硶绠楀紡鎴栧垎鏁.
绛旓細鍐呴」涔嬬Н涓猴細2 x 8 = 24 鐢变簬涓ょН涓嶇瓑锛屾晠涓や釜姣斾笉鎴愭瘮渚嬨(2)澶栭」涔嬬Н涓猴細0.2 x 50 =10 鍐呴」涔嬬Н涓猴細2.5 x 4 = 10 鐢变簬涓ょН鐩哥瓑锛屾晠涓や釜姣旀垚姣斾緥銆(3)澶栭」涔嬬Н涓猴細1/3 x 1/4= 1/12 鍐呴」涔嬬Н涓猴細1/6 x 1/2= 1/12 鐢变簬涓ょН鐩哥瓑锛屾晠涓や釜姣旀垚姣斾緥銆(4)澶栭」涔...
绛旓細鏍规嵁AB=CD锛岃兘缁勬垚姣斾緥鐨勬湁C Aa锛歜=c:d Ba:c=b;a C b:d=c锛歛 鍦ㄤ笅闈㈢殑鍥涗釜姣斾腑锛岃兘缁勬垚姣斾緥鐨勬槸銆怋銆慉6:3鍜8:5 B0.2:2.5鍜4:50 C0.5:0.2鍜4鍒嗕箣3:4鍒嗕箣1 D2锛3鍜4:5
绛旓細6:3=8:5搴旇灏辨槸杩欎釜鏍峰瓙浜
绛旓細鎸夋暟瀛︾畻娉曠殑璇 16姣5
绛旓細7:3 鍜8:5涓嶆垚姣斾緥 0.2:2.5鍜4:50 鎴愭瘮渚嬶細0.2:2.5=4:50 3鍒嗕箣1:9鍒嗕箣1鍜2鍒嗕箣1:6鍒嗕箣1 鎴愭瘮渚嬶細1/3锛1/9=1/2锛1/6 1.2锛3鍒嗕箣2鍜5鍒嗕箣3:3鍒嗕箣1 鎴愭瘮渚嬶細 1.2锛2/3=3/5锛1/3
绛旓細鐢0.2姣2.5鍜4姣50缁勬垚8涓瘮渚嬶細0.2 锛2.5=4 锛50 0.2 锛4=2.5 锛50 4 锛50=0.2 锛2.5 4 锛0.2=50 锛2.5 2.5 锛0.2=50 锛4 2.5 锛50=0.2 锛4 50 锛4=2.5 锛0.2 50 锛2.5 = 4 锛0.2
绛旓細2.5 锛4 =2.5x2 锛4x2 =5 锛8 11/20 锛5/8 =11/20x40 锛5/8x40 =22 锛25 0.2 锛0.12 =0.2x50 锛0.12x50 =10 锛6 =5 锛3 --- 濡傛灉浣犺鍙垜鐨勫洖绛旓紝鏁鍙婃椂閲囩撼锛佽鍦ㄥ彸涓婅鐐瑰嚮鈥滆瘎浠封濓紝鐒跺悗灏卞彲浠ラ夋嫨鈥滄弧鎰忥紝闂宸茬粡瀹岀編瑙ｅ喅鈥濅簡锛侊紒绁濆涔犺繘姝ワ紒锛侊紒
