1.49+499+4999+49999+499999;2.(1+11+21+31+41)+(9+19+29+39+49)1.49+499+4999+49999+499999; 2.(1+11+21+31+41)+(9+19+29+39+49) 3.(9999+9997+1995+……+9001)-(1+3+5+……+999 ) 4.123+234+345+456+5657+678+789 5.1400÷25÷
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 23:26:09
1.49+499+4999+49999+499999;2.(1+11+21+31+41)+(9+19+29+39+49)1.49+499+4999+49999+499999; 2.(1+11+21+31+41)+(9+19+29+39+49) 3.(9999+9997+1995+……+9001)-(1+3+5+……+999 ) 4.123+234+345+456+5657+678+789 5.1400÷25÷
1.49+499+4999+49999+499999;2.(1+11+21+31+41)+(9+19+29+39+49)
1.49+499+4999+49999+499999; 2.(1+11+21+31+41)+(9+19+29+39+49) 3.(9999+9997+1995+……+9001)-(1+3+5+……+999 ) 4.123+234+345+456+5657+678+789 5.1400÷25÷8+350÷4÷125 6.9÷13+13÷9+11÷13+14÷9+6÷13
6.(0.36×5.1×81)÷(0.17×8.1×0.4)
六道都要写
1.49+499+4999+49999+499999;2.(1+11+21+31+41)+(9+19+29+39+49)1.49+499+4999+49999+499999; 2.(1+11+21+31+41)+(9+19+29+39+49) 3.(9999+9997+1995+……+9001)-(1+3+5+……+999 ) 4.123+234+345+456+5657+678+789 5.1400÷25÷
1.49+499+4999+49999+499999;
=50+500+5000+50000+500000-5
=555550-5
=555545
2.(1+11+21+31+41)+(9+19+29+39+49)
=(1+9)+(11+19)+21+29)+(31+39)+(41+49)
=10+30+50+70+90
=50×5
=250
1/ =500000+50000+5000+500+50-5=555545;
2/ =21*(2+2+1)+29*(2+2+1)=250
1.49+499+4999+49999+499999
=50-1+500-1+5000-1+50000-1+500000-1
=555550-5=555545
2.(1+11+21+31+41)+(9+19+29+39+49)
=1+49+11+39+21+29+31+19+41+9
=5*50=250
1.49+499+4999+49999+499999
原式=50+500+5000+50000+500000-5
=555550-5
=555545
2.(1+11+21+31+41)+(9+19+29+39+49)
原式=(1+9)+(11+19)+21+29)+(31+39)+(41+49)
=10+30+50+70+90
=50×5
=250
1 555550-5=555545
2 50X5=250
1.=49+1+499+1+4999+1+49999+1+499999+1-5
=555550-5
=555545
2.=1+9+11+19+21+29+31+39+41+49
=1+49+11+39+21+29+31+19+41+9
=50×5=250
3.=9000×999=8991000
4.
1.=50-1+500-1+5000-1+500000-1+500000-1=555550-5=555545
2.=1+49 +11+39 +21+29 +31+19+41+9=50*5=250
3.=9001-1+9003-3……9999-999=9000*500=4500000
4.题目应该是123+234+345+456+567+678+789吧。
百位上是1...
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1.=50-1+500-1+5000-1+500000-1+500000-1=555550-5=555545
2.=1+49 +11+39 +21+29 +31+19+41+9=50*5=250
3.=9001-1+9003-3……9999-999=9000*500=4500000
4.题目应该是123+234+345+456+567+678+789吧。
百位上是1+2+3+4+5+6+7=28*100=2800
十位上是2+3+4+5+6+7+8=35*10=350
个位上是3+4+5+6+7+8+9=42
一共等于2800+350+42=3192
5.=1400/200+350/500=7.7
6.(9+11+6)/13+(13+14)/9+6=11
6.=(0.36/0.4)*(5.1/0.17)*(81/8.1)=0.9*30*10=270
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