题文
(1)(28×+12×175%)÷ (2)0.35÷0.125÷64÷0.5÷0.25 (3)1.25×98+12×+1 (4)3×2345+555÷+654.3×36 (5)+-+-+- (6)++…=2008. |
题型:解答题 难度:中档
答案
(1)(28×+12×175%)÷, =(28×+12×175%)×, =28××+12×175%×, =+8, =26;
(2)0.35÷0.125÷64÷0.5÷0.25, =0.35÷(0.125×64×0.5×0.25), =0.35÷(0.125×8×8×0.5×0.25), =0.35÷[(0.125×8)×(0.5×0.25×8)], =0.35÷[1×1], =0.35÷1, =0.35;
(3)1.25×98+12×+1, =1.25×98+12.5×0.1+1.25, =1.25×98+1.25×1+1.25, =1.25×(98+1+1), =1.25×100, =125;
(4)3×2345+555÷+654.3×36, =3.6×2345+555÷+6543×3.6, =3.6×2345+6543×3.6+555÷, =3.6×(2345+6543)+555×, =3.6×8888+5683.2, =37680;
(5)+-+-+-, =1-++--++--++--, =1-, =;
(6)++…=2008, x-+-+…+-=2008, x-=2008, x=2008, x÷=2008÷, x=2009. |
据专家权威分析,试题“(1)(28×74+12×175%)÷218(2)0.35÷0.125÷64÷0.5÷0.25(3)1.25×..”主要考查你对 整数,小数,分数,百分数和比例的混合计算 等考点的理解。关于这些考点的“档案”如下:
整数,小数,分数,百分数和比例的混合计算
考点名称:整数,小数,分数,百分数和比例的混合计算
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