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四点3×2点4+2点5×5点七(脱式计算)

7.56+3.5×2.4-7.56 =(7.56-7.56)+8.4 =0+8.4 =8.4

你好,很高兴在这里回答你的问题: . . . 3.5*2.34+3.5*2.30 =3.5*(2.34+2.30) =3.5*4.64 =16.24

3.6×5.4+3.6×4.6=3.6×(5.4+4.6)=3.6×10=36 望采纳

14/15。解答过程如下:(2/3+4/15×5/6)÷(20/21)=(2/3+2/9)×21/20=8/9×21/20=14/15

2.5×4.4 =2.5×4×1.1 =10×1.1 =11

4.2x5.5x1.2=23.1x1.2=27.72

原式 =2.5x0.23x4 =(2.5x4)x0.23 =10x0.23 =2.3 供参考。

6.5×2.4-6.5+6.5×8.6 =6.5×(2.4-1+8.6) =6.5×10 =65

7.06×2.4-5.7 =16.944-5.7 =11.244

5.283×2 4.27脱式计算 5.283×2 4.27 =10.566+4.27 =14.836 直接计算 没有简算

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