20
1+2-3+5-6+7+8+2×6+12-18=?
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相关问题
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6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
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2.25×1.8-12.5×0.18= 3/8+5/8÷5/6=
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解方程:①[7/8]x=[5/6] ②[2/3]x-6=2 ③[2/3]×x×[1/2]=18.
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解方程 4.7×12-10x=18x 5.7(2x-6)=8 6.3(6x-7)=15x+12
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计算:(1)12-(-18)+(-7)-15(2)(-48)÷8-(-25)×(-6)(3)-2 2 +3×(-1) 4
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2/3-1/6 3/4+1/8 6/7+7/9-6/7+7/9 7/18*36-7/18 1/6÷(5/12-1/24)
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1 8/13÷7+1/7×6/13 2 2-6/13÷9/29-2/3 3 5/12×(5/6+3/4)+4/5
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2.1X+7.9X=6.9 5X+0.8×2=7.12X+5.8=8.2 6X-3×4=1.2
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3/5√12-2√27+2/3√75=?√15×√6/3=?√7÷﹙√7-3﹚-√36=?﹙√6-√18﹚²-