6道差倍 问题的题 要算式,不要方程,(方程不采纳)
推荐回答(2个)
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画线段图分析(画了4题,5、6两题原理同4题,自己画一下):
一、
哥哥比妹妹多用:180-30=150(元)
这时剩下的相等,说明哥哥带的钱比妹妹多150元
已知,哥哥的是妹妹的2倍,也就是多1倍(妹妹是1倍)
所以妹妹:(180-30)/(2-1)=150(元)
哥哥:150×2=300(元)
二、
米比面多:138-94=44(千克)
用掉相同数量后剩下的米是面的3倍,也就是米多2倍(面是1倍),
所以面剩下的:(138-94)/(3-1)=22(千克)
用掉了:94-22=72(千克)
每天用9千克,用了几天:(94-22)/9=8(天)
三、
调走相同人数后剩下的,二校区是一校区的4倍,一校区是1倍,二校区多3倍,
一校区剩下的:540/(4-1)=180(人)
一校区原来:180+200=380(人)
二校区原来:380+540=920(人)
四、
“第一盘拿2个放到第二盘,两盘相等”,说明原来第一盘比第二盘多:2×2=4(个)
然后,第二盘又减少2,第一盘增加2,第一盘就比第二盘多:4+2+2=8(个)
这时第一盘是第二盘的2倍,也就是多1倍,
所以这时第一盘:(4+2+2)×2=16(个),原来有;16-2=14(个)
五、
“如果小青给小红1只,两人一样多”,说明小青比小红多:1×2=2(支)
“如果小红给小青1只”,这时小青比小红多:2+1+1=4(支)
这时“小青就是小红的2倍”也就是多1倍,即小红4支,小青4×2=8(支)
原来小红:4+1=5(支),小青:8-1=7(支)
六、
因为小明给小刚两个,两人的弹球一样多,说明小明比小刚多:2×2=4(个)
如果小刚给小明两个,两人的数量差就是:4+2+2=8(个),这时小明的数量将是小刚的3倍,即比小刚多2倍,小刚是1倍。
即这时小刚:8/(3-1)=4(个),小明:4×3=12(个)
所以,原来小刚:4+2=6(个),小明:12-2=10(个)
180-30x2=120(元)妹 :120+30=150(元) 兄:150x2=300(元)
138-94=44(千克)44+44÷2=66(千克)138-66=72(千克)72÷9=8(天)
540÷3=180(人)540+180=720(人)一校区:180+200=380((人)二校区:720+200=920(人)
2x2=4(个)2x2=4(个)4+4=8(个)第一盘有8+2+4=14(个)
1x2=2(支)1x2=2(支)2+2=4(支)小红:4+1=5(支)小青:5+2=7(支)
2x2=4(个)2x2=4(个)4+4=8(个)8÷2=4(个)小刚:4+2=6(个)小明:6+4=10(个)
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