数学简算题,答对加分! 快!
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数学简算题,答对加分! 快!
一.(1+1/5-0.1+2/15)*(0.2-1/10+2/15+19/6)-(1+1/5-1/10+2/15+19/6)*(0.2-0.1+2/15)
二.159*(350350350/530530530)-105*(103/104)
三.(59/2)*(2/3)+(128/3)*(3/4)+(197/4)*(4/5)+(296/5)*(5/6)
快点啊!
一.(1+1/5-0.1+2/15)*(0.2-1/10+2/15+19/6)-(1+1/5-1/10+2/15+19/6)*(0.2-0.1+2/15)
二.159*(350350350/530530530)-105*(103/104)
三.(59/2)*(2/3)+(128/3)*(3/4)+(197/4)*(4/5)+(296/5)*(5/6)
快点啊!
![数学简算题,答对加分! 快!](/uploads/image/z/2160106-34-6.jpg?t=%E6%95%B0%E5%AD%A6%E7%AE%80%E7%AE%97%E9%A2%98%2C%E7%AD%94%E5%AF%B9%E5%8A%A0%E5%88%86%21+%E5%BF%AB%21)
一.(1+1/5-0.1+2/15)*(0.2-1/10+2/15+19/6)-(1+1/5-1/10+2/15+19/6)*(0.2-0.1+2/15)
=(1+1/5-0.1+2/15)*(0.2-1/10+2/15)+(1+1/5-0.1+2/15)*(19/6)-(1+1/5-1/10+2/15)*(0.2-0.1+2/15)
-19/6 *(0.2-0.1+2/15)
=(1+1/5-0.1+2/15)*(19/6)-19/6 *(0.2-0.1+2/15)
=1 *19/6=19/6
二.159*(350350350/530530530)-105*(103/104)
=3x53x(350350350/530530530)-(104+1)(104-1)/104
=3x(350350350/10010010)-(104x104-1)/104
=3x35-104+1/104=105/104
三.(59/2)*(2/3)+(128/3)*(3/4)+(197/4)*(4/5)+(296/5)*(5/6)
=59/3+32+40-3/5+50-2/3
=19-3/5+122
=140.4
=(1+1/5-0.1+2/15)*(0.2-1/10+2/15)+(1+1/5-0.1+2/15)*(19/6)-(1+1/5-1/10+2/15)*(0.2-0.1+2/15)
-19/6 *(0.2-0.1+2/15)
=(1+1/5-0.1+2/15)*(19/6)-19/6 *(0.2-0.1+2/15)
=1 *19/6=19/6
二.159*(350350350/530530530)-105*(103/104)
=3x53x(350350350/530530530)-(104+1)(104-1)/104
=3x(350350350/10010010)-(104x104-1)/104
=3x35-104+1/104=105/104
三.(59/2)*(2/3)+(128/3)*(3/4)+(197/4)*(4/5)+(296/5)*(5/6)
=59/3+32+40-3/5+50-2/3
=19-3/5+122
=140.4