第1个回答 2015-03-06
4.62x3/7-5.39x(-3/7)+3.01÷(-2又1/3）
=4.62x3/7+5.39x(3/7)-3.01x(3/7）
=3/7x(4.62+5.39-3.01)
=3/7x7
=3
(-3)²÷2又1/4x（-2/3）+4-2²x(-1/3)
=9÷9/4×(-2/3)+4-4×(-1/3)
=9x4/9x(-2/3)+4+4/3
=-8/3+16/3
=8/3
1/1x3+1/3x5+1/5x7+.....+1/99x101
=(2/1x3+2/3x5+2/5x7+.....+2/99x101)÷2
=(1-1/3+1/3-1/5+1/5-1/7+1/7-.....1/98-1/99+1/99-1/101)÷2
=(1-1/101)÷2
=100/101÷2
=50/101
=4.62x3/7+5.39x(3/7)-3.01x(3/7）
=3/7x(4.62+5.39-3.01)
=3/7x7
=3
(-3)²÷2又1/4x（-2/3）+4-2²x(-1/3)
=9÷9/4×(-2/3)+4-4×(-1/3)
=9x4/9x(-2/3)+4+4/3
=-8/3+16/3
=8/3
1/1x3+1/3x5+1/5x7+.....+1/99x101
=(2/1x3+2/3x5+2/5x7+.....+2/99x101)÷2
=(1-1/3+1/3-1/5+1/5-1/7+1/7-.....1/98-1/99+1/99-1/101)÷2
=(1-1/101)÷2
=100/101÷2
=50/101
第2个回答 2015-03-06
5)原式=4.62x3/7+5.39x3/7-3.01x3/7
=3/7(4.62+5.39-3.01)
=3/7x7=3
6)原式=9x4/9x4/9+4+4x1/3
=16/9+16/3=48/9
原式=1/2（1-1/3+1/3-1/5+1/5-1/7.....+1/99-1/101）
=1/2x(1-1/101)
=1/2x100/101
=50/101
=3/7(4.62+5.39-3.01)
=3/7x7=3
6)原式=9x4/9x4/9+4+4x1/3
=16/9+16/3=48/9
原式=1/2（1-1/3+1/3-1/5+1/5-1/7.....+1/99-1/101）
=1/2x(1-1/101)
=1/2x100/101
=50/101
第3个回答 2015-03-06
第二个是 1-1/101=100/101追问
恩，第一个呢
追答这不就是简单的运算么
追问呃呃呃，小数不会划分数额
追答把小数先化成分数，4.62=462/100 然后462/100×3/7=198/100=1.98，后边自己做吧
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