3.549.9+3.540.1 2.90.45+0.294.2+0.02913 6.499 9.580.81.25 101*0.68简算快急

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3.54*9.9+3.54*0.1 2.9*0.45+0.29*4.2+0.029*13 6.4*99 9.58*0.8*1.25 101*0.68简算快急
3.54*9.9+3.54*0.1 2.9*0.45+0.29*4.2+0.029*13 6.4*99 9.58*0.8*1.25 101*0.68简算
快急

3.54*9.9+3.54*0.1 2.9*0.45+0.29*4.2+0.029*13 6.4*99 9.58*0.8*1.25 101*0.68简算快急
3.54 x 9.9 +3.54 x 0.1 = 3.54 x ( 9.9 + 0.1 ) = 3.54 x 10 = 35.4
2.9 x 0.45 + 0.29 x 4.2 + 0.029 * 13 = 0.29 x 10 x 0.45 +0.29 x 4.2 + 0.29 x 0.1 x 13
=0.29 x ( 4.5 + 4.2 +1.3 ) = 0.29 x 10 = 2.9
6.4 x 99.9 = 6.4 x ( 100 - 0.1 ) = 6.4 x 100 - 6.4 x 0.1 = 640 - 0.64 = 639.36
9.58 x 0.8 x 1.25 =9.58 x ( 0.8 x 1.25 ) = 9.58 x 1 =9.58
101 x 0.68 = ( 100 + 1) x 0.68 = 100 x 0.68 + 1 x 0.68 = 68 + 0.68 =68.68

3.54*9.9+3.54*0.1=3.5(9.9+0.1)=35
2.9*0.45+0.29*4.2+0.029*13=0.029*(45+42+13)=2.9
6.4*99=6.4*100-6.4=640-6.4=633.6
9.58*0.8*1.25=9.58*10=95.8
101*0.68=100*0.68+0.68=68.68

3.54*9.9+3.54*0.1 2.9*0.45+0.29*4.2+0.029*13 6.4*99 9.58*0.8*1.25 101*0.68简算快急 3.54乘99+3.54简便计算 3.54+6.4-3.54+2.6 怎么简便计算急急急！！！！！ -2+4.72-3.54+5.28-16. 18.7x-x=3.54 3.54平方公里.等于多少千米? 3.54+9.17-5.17+4.46如何简便计算? 43.54+6.4-3.54+12.6怎么简便计算? 109.1-3.54-6.46+0.9简便运算 3.54x3.27怎么算,竖式 7.92+3.08-3.54-6.45用简便计算 -6-8-2+3.54-4.72+16.46-5.28 15.7-4.3+3.54+4.3简便计算 3.54×0.5×2用简便算式计算 3.54是由几个0.001组成的 3.54这个数中5表示( )个( ) 24(1-x)(1-x)=3.54 下面的数和3.54比较,大小有什么变化?3.54 0.354 35.4 0.0354 3540