5道小学奥数计算题,,对了追加160 急急急!!
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发布时间:2024-09-29 16:18
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共5个回答
热心网友
时间:2024-11-15 00:56
1. 1.25*67.875+125*6.7825+1.25*53.875
=1.25*67.875+1.25*678.25+1.25*53.875
=1.25*(67.875+678.25+53.875)
=1.25*800
=1000
2. 〔4.8*7.5*8.1〕/〔2.4*2.5*2.7〕
=〔2*2.4*3*2.5*3*2.7〕/〔2.4*2.5*2.7〕
=2*3*3
=18
3. 1.2*2.4*4.8+2*4*8+13/1*13/2*13/4/1.2*3.6*10.8+2*6*18+13/1*13/3*13/9
题中“13/1*13/2*13/4/1.2*3.6*10.8”不清楚。
4. 99又98/97*49
=(100-1/98)*49
=100*49-1/98*49
=4900-1/2
=4899.5
5. 7/4*23又13/12+16*7/1+7/1*13/4
=4/7*23又12/13+(16+4/13)*1/7
=
热心网友
时间:2024-11-15 00:56
(1) 1.25*67.875+1.25*678.25+1.25*53.875
=1.25(67.875+678.25+53.875)
=1.25*800
=1000
热心网友
时间:2024-11-15 00:56
1. 1.25*67.875+125*6.7825+1.25*53.875
=1.25*67.875+1.25*678.25+1.25*53.875
=1.25*(67.875+678.25+53.875)
=1.25*800
=1000
2. 〔4.8*7.5*8.1〕/〔2.4*2.5*2.7〕
=(2.4*2*2.5*3*2.7*3)/(2.4*2.5*2.7)
=2*3*3
=18
3. 1.2*2.4*4.8+2*4*8+13/1*13/2*13/4/1.2*3.6*10.8+2*6*18+13/1*13/3*13/9
=
不清楚
4. 99又98/97*49
=(100-1/98)*49
=4900-49/98
=4900-1/2
=4899又2分之1
5. 7/4*23又13/12+16*7/1+7/1*13/4
=7分之4*(23又13/12+4+13分之1)
=7分之4*28
=16
热心网友
时间:2024-11-15 00:57
1. 1.25*67.875+12.5*6.7825+1.25*53.875
=1.25*(67.875+67.825+53.875)
=1.25*188.575
=235.71875
2.(4.8*7.5*8.1)/(2.4*2.5*2.7)
=(2.4*2*2.5*3*2.7*3)/(2.4*2.5*2.7)
=2*3*3
=18
3. 不清楚
4. 99又98/97*49
=(100-1/98)*49
=4900-1/2
=4899又1/2
5.16
热心网友
时间:2024-11-15 00:58
1. =125*0.67875+125*6.7825+125*0.53875
=125*(0.67875+6.7825+0.53875)