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a÷0.01=b×0.01
40×1.12×1.1
69×9.1+0.9×69
x÷1.3×7=0.28
m÷0.1=n×0.1
3×0.1==0.3
99999×1.02-33333×0.06
(1.7×2.5×4.2)÷(0.5×0.7×3.4)
875×12.1+125×15.3
13×3.1+39×2.3
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