这个题,并用两种方法验算100-75.4= 105x28用两种方法验算
\u8ba1\u7b97\u4e0b\u9762\u5404\u9898,\u5e76\u7528\u4e24\u79cd\u65b9\u6cd5\u9a8c\u7b97100\u4e0074.5\u8ba1\u7b97\u4e0b\u9762\u5404\u9898,\u5e76\u7528\u4e24\u79cd\u65b9\u6cd5\u9a8c\u7b97
100\u4e0074.5=25.5
\u9a8c\u7b97\uff1a
25.5+74.5=100
\u6216\uff1a
100-25.5=74.5
\u89e3\uff1a
105x28
=100x28+5x28
=2800+140
=2940
\u9a8c\u7b97\uff1a
\u65b9\u6cd5\uff081\uff09
2940\u00f7105
=\uff082100+840\uff09\u00f7105
=2100\u00f7105+840\u00f7105
=20+8
=28
\u65b9\u6cd5\uff082\uff09
2940\u00f728
=\uff082800+140\uff09\u00f728
=2800\u00f728+140\u00f728
=100+5
=105
\u6269\u5c55\u8d44\u6599\uff1a
\u68c0\u9a8c\u52a0\u6cd5\u65f6\uff0c\u5982\u679c\u5404\u4e2a\u52a0\u6570\u7684\u4e5d\u4f59\u6570\u4e4b\u548c(\u5982\u8d85\u8fc79\u518d\u51cf\u53bb9\u7684\u500d\u6570)\u7b49\u4e8e\u548c\u7684\u4e5d\u4f59\u6570\u65f6\uff0c\u5176\u8ba1\u7b97\u7ed3\u679c\u53ef\u80fd\u5c31\u662f\u6b63\u786e\u7684\u3002
14367+7289=21656
\u4f8b\u5982\uff1a
12-9=3
3+8=11 5+6=11
11-9=11-9
\u53c8\u5982\uff1a81369+72459=153828
0+0=18-9\u00d72
解析:
80×64=5120
验算:
5120÷64=80
或:
64×80=5120
绛旓細瑙f瀽锛100-8.15=91.85 楠岀畻锛91.85+8.15=100 鎴栵細100-91.85=8.15
绛旓細(100-3x)梅2=8 瑙o細100-3x=8x2 3x=100-16 x=84梅3 x=28 楠岀畻锛氬乏杈=锛100-3x28锛壝2=8锛屽彸杈=84銆傚乏杈=鍙宠竟锛屾墍浠=28鏄柟绋嬬殑瑙c傚笇鏈涜兘甯埌浣狅紒
绛旓細83鍗亁=100 瑙:83鍗亁-83=100-83 x=17 妫楠: 鎶妜=17浠e叆鍘熸柟绋嬪緱 宸﹁竟=83+17 =100=鍙宠竟 鎵浠,x=17鏄柟绋嬬殑瑙c
绛旓細涓嶅鍑忕殑闇鍚戦珮浣嶅1,渚濇璁$畻鍙互寰楀嚭缁撴灉,鍑忔暟灏忎簬琚噺鏁板皢涓ゆ暟璋冩崲鐩稿噺鏈鍚庣粨鏋滃姞涓礋鍙凤紱灏忔暟閮ㄥ垎鐩稿噺鍙弬鐓ф暣鏁扮浉鍑忔楠わ紱瑙i杩囩▼:姝ラ涓:10-1=9 鍚戦珮浣嶅1 姝ラ浜:10-8-1=1 鍚戦珮浣嶅1 姝ラ涓:1-0-1=0 鏍规嵁浠ヤ笂璁$畻姝ラ缁勫悎璁$畻缁撴灉涓19 楠岀畻:19+81=100 ...
绛旓細棣栧厛锛屾敼鎴涓鐧脳0.8脳30脳6锛屽啀鎶100脳30锛6脳0.8锛岀瓑浜3000脳4.8锛
绛旓細閮戒箻浠2灏辫浜 50x2=100 24x2=48 鎵浠24鍒楠岀畻鎴100鍒嗙浉褰撲簬鑰冧簡48鍒
绛旓細9700梅240绔栧紡锛9700梅240锛40路路路100 闄ゆ硶鐨勯獙绠楁湁涓ょ鏂规硶鎯呭喌锛氫竴鏄病鏈変綑鏁扮殑闄ゆ硶,楠岀畻鏃剁敤鍟嗗拰闄ゆ暟鐩镐箻,鐪嬬湅缁撴灉鏄惁绛変簬琚櫎鏁帮紱濡傛灉涓嶇瓑浜庡垯璁$畻閿欒锛岀瓑浜庡垯璁$畻姝g‘銆備簩鏄湁浣欐暟鐨勯櫎娉,灏辩敤鍟嗗拰闄ゆ暟鐩镐箻鍐嶅姞涓婁綑鏁,鐪嬬粨鏋滄槸鍚︾瓑浜庤闄ゆ暟銆傚鏋滀笉绛変簬鍒欒绠楅敊璇紝绛変簬鍒欒绠楁纭傚げ棰橈細9700...
绛旓細= 100*99 = 9900 250*32 = 250*4*8 = 1000*8 = 8000 (98+98+98+98)*25 = 4*98*25 = 4*25*98 = 100*98 = 9800 鑴卞紡璁$畻棰樺ぇ鍏ㄥ甫绛旀 0.4脳125脳25脳0.8 =(0.4脳25)脳(125脳0.8) =10脳100=1000 1.25脳(8+10) =1.25脳8+1.25脳10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8...
绛旓細璁$畻涓嬮潰鍚棰橈紝骞剁敤涓ょ鏂规硶楠岀畻銆 419+387 2.84+3.76 16.32-7.95 100-74.5 80x64 105 105鏃犳剰涔夛紝鏈夊姞寮忎袱棰橈紝鍑忓紡涓ら锛屼箻寮忎竴棰橈紝鍏变簲棰樿繍绠楋紝楠岀畻鐢ㄥ緱鏁板弽绠楀嵆鍙
绛旓細15.4+6.87=22.27 楠岀畻锛 3.56+27.84=31.4 楠岀畻锛 100-82.13=17.87 楠岀畻锛 123.56-47.9+51.7=127.36 楠岀畻锛