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简便计算1250X0.037+0.125X160+12.5X2.7 0.45x72+45x0.18+4.5 400.6x7-2003x0.4 239x732+956x8.2 50x0.13x0.2 3.4x7-1.5 2.33x0.5x0.4x5 9.78x99+9.78 1.6x7.5x1.25 2.5x13+0.9 要用递等试!
题目详情
简便计算
1250X0.037+0.125X160+12.5X2.7 0.45x72+45x0.18+4.5 400.6x7-2003x0.4 239x732+956x8.2 50x0.13x0.2 3.4x7-1.5 2.33x0.5x0.4x5 9.78x99+9.78 1.6x7.5x1.25 2.5x13+0.9 要用递等试!
1250X0.037+0.125X160+12.5X2.7 0.45x72+45x0.18+4.5 400.6x7-2003x0.4 239x732+956x8.2 50x0.13x0.2 3.4x7-1.5 2.33x0.5x0.4x5 9.78x99+9.78 1.6x7.5x1.25 2.5x13+0.9 要用递等试!
▼优质解答
答案和解析
1250X0.037+0.125X160+12.5X2.7=12.5×3.7+12.5×1.6+12.5X2.7=12.5（3.7+1.6+2.7）=12.5X8=100
0.45x72+45x0.18+4.5=4.5x7.2+4.5x1.8+4.5x1=4.5（7.2+1.8+1）=4.5x10=45
50x0.13x0.2=50x0.2x0.13=10x0.13=1.3
3.4x7-1.5
2.33x0.5x0.4x5=2.33x0.5x2=2.33x1=2.33
0.45x72+45x0.18+4.5=4.5x7.2+4.5x1.8+4.5x1=4.5（7.2+1.8+1）=4.5x10=45
50x0.13x0.2=50x0.2x0.13=10x0.13=1.3
3.4x7-1.5
2.33x0.5x0.4x5=2.33x0.5x2=2.33x1=2.33
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