递等式要巧算 0.3+0.3÷0.3-0.3×0.3 1.2÷1.25

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递等式要巧算0.3+0.3÷0.3-0.3×0.31.2÷1.25递等式要巧算0.3+0.3÷0.3-0.3×0.31.2÷1.25递等式要巧算0.3+0.3÷0.3-0.3×0.31.2÷1.250

递等式要巧算 0.3+0.3÷0.3-0.3×0.3 1.2÷1.25
递等式要巧算 0.3+0.3÷0.3-0.3×0.3 1.2÷1.25

递等式要巧算 0.3+0.3÷0.3-0.3×0.3 1.2÷1.25
0.3+0.3÷0.3-0.3×0.3
=0.3+1-0.9
=0.3+0.1
=0.4
1.2÷1.25
=6/5÷10/8
=6/5×8/10
=48/50
=96/100
=0.96

递等式 0.1+0.2+0.3+0.4+0.5+……+9.8+9.9 =0.1+9.9+0.2+9.8+ =10*99/2 =445 495 (0.1+9.9)×99÷2=

1 楼上做的完全正确, 并且最好!!!