计算。
1/9+5/9+2/9= 6/11+3/11+1/11=
1/4+1/4+3/4= 7/10-1/10-3/10=
11/6-7/6-1/6= 1-2/3-1/3=
计算。7/8-5/6= 2/9+1/2= 6/7-2/3= 3/10+1/4=3/7+1/9= 1/3-1/5= 1/6+1/4= 5/7-1/5=
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先计算,再想一想怎样算得比较快。 1/3-1/4= 1/2+1/5=1/6-1/7= 1/5+1/6=1/7-1/8= 1/8+1/9=1/2-1/3= 1/9+1/10=19/90
计算。4/3-(2/5+3/10) 5/7+1/4-9/14 3/4+3/6-5/8
计算。3/7+4/5= 5/12+5/8= 7/9+6/7= 1-2/7-3/7= 1/4+1/6+3/4= 1/2-1/6=
计算下面各题。 3/4+5/6= 2/3-1/4= 4/5+11/15+3/10= 7-5/7= 1/2+2/3= 6-(3/4-2/5)=
下面各题,怎样简便就怎样计算。41×101 4.05-2.8-0.712×(1/4+1/6-1/3)
计算:(1)(-8)-(-1) (2)45+(-30) (3)-1.5-(-11.5) (4)-1/4-(-1/2) (5)15-[1-(-20-4)] (6)-40-28-(-19)+(-24) (7)22.54+(-4.4)+(-12.54)+4.4 (8) (2/3-1/2)-(1/3-5/6) (9)2.4-(-3/5)+(-3.1)+4/5 (10)(-6/13)+(-7/13)-(-2)(11)3/4-(-11/6)+(-7/3)(12)11+(-22)-3×(-11)(13)(-0.1)÷1/2×(-100)(14)(-3/4)×(-2/3 - 1/3) ×0(15)(-2)3-32(16)23÷[(-2)3-(-4)](17)(3/4-7/8)÷(-7/8)(18)(-60)×(3/4+5/6)