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55乘九点九用脱式怎么算

0.85 × 9.9 = 0.85 × (10 - 0.1) = 8.5 - 0.085 = 8.415

7.49x9.9 =7.49x(10-0.1) =7.49x10-7.49x0.1 =74.9-0.749 =74.151

6.5gyhhghvvjhggggghhhjhgcvfdddgzxdhjdcjsdragwt75ad英语

5.7x9.9 =5.7x(100一0.1) =5.7x100-5.7x0.1 =570-0.57 =569.43

9.9*4.8+0.48 =0.48*(99+1) =0.48*100 =48

9.9×4.6=45.54

2.4×9.9 =2.4×(10-0.1) =2.4×10-2.4×0.1 =24-0.24 =23.76

9.2×9.9 =9.2×(10-0.1) =92 -0.92 =91.08

2.9-2.9x0.9 =2.9x(1-0.9) =2.9x0.1 =0.29 朋友,请及时采纳正确答案,下次还可能帮到您哦,您采纳正确答案,您也可以得到财富值,谢谢。

原式 =91+9x91 =(1+9)x91 =10x91 =910 供参考。

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