小学数学六年级下册百分数口算题练习.docx

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2、060%=5080%=10030%=70040%=30040%=7090%=4030%=10010%=4090%=3020%=6010%=6060%=100090%=90030%=4060%=1090%=80010%=9090%=1070%=4020%=200060%=30030%=80090%=40050%=200080%=2020%=1020%=50050%=200090%=40080%=100010%=10050%=7020%=8080%=2090%=5070%=90050%=60020%=7070%=70010%=6050%=5050%=9060%=9070%=2050%=40070%

3、=60080%3040%=40010%=70(1-80%)=(1-30%)40=(1-40%)10=80(1-90%)=300(1-40%)=20(1-60%)=(1-40%)300=40(1-50%)=70(1-10%)=100(1-60%)=90(1+70%)=(1+90%)3000=1000(1-10%)=(1+60%)500=5500(1-60%)=(1+80%)70=(1-10%)9000=(1-90%)6000=400(1-50%)=(1-20%)400=(1-50%)200=(1+10%)600=(1-20%)700=(1+30%)600=(1+70%)200=800(1-70%

4、)=(1-10%)400=(1+60%)100=(1-30%)400=(1+70%)4000=(1-10%)20=7000(1-40%)=(1+10%)60=(1+10%)2000=8000(1-70%)=30(1-60%)=(1-10%)60=(1-30%)7000=(1+30%)40=90(1-20%)=300(1-10%)=(1+110%)60=(1+90%)1000=(1+10%)40=(1+40%)2000=(1+10%)500=(1-60%)60=(1-80%)30=(1+40%)110=770(1-60%)=2030%=70070%=8070%=20010%=80070%=400

5、10%=9060%=(1+40%)900=(1+50%)20=40020%=6050%=(1-60%)80=340(1-70%)=(1+50%)600=(1-60%)50=20(1-10%)=(1+30%)10=(1-10%)20=100(1-80%)=(1-50%)80=(1-90%)600=7000(1-20%)=(1-30%)80=(1-90%)90=(1-40%)20=(1-20%)900=500(1-20%)=20(1-80%)=(1-50%)600=(1+20%)800=(1+30%)400=(1-30%)800=700(1-60%)=(1-60%)5000=(1-90%)10=(1+20%)30=(1+70%)5000=3000(1-20%)=(1-50%)8000=700(1-10%)=(1+30%)60=(1-70%)70=70(1-70%)=(1+60%)900=(1+10%)900=(1-20%)90=(1+80%)50=(1+30%)90=(1-40%)9000=5000(1-50%)=(1-30%)700=(1+80%)700=(1+30%)4000=(1-10%)500=(1+10%)80=(1-90%)9000=2000(1-40%)=(1-20%)40=300(1-90%)=