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
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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](/uploads/image/z/7237-37-7.jpg?t=3.54%2A9.9%2B3.54%2A0.1+2.9%2A0.45%2B0.29%2A4.2%2B0.029%2A13+6.4%2A99+9.58%2A0.8%2A1.25+101%2A0.68%E7%AE%80%E7%AE%97%E5%BF%AB%E6%80%A5)
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