2.5×80= 5.2+2.1×0= 5.5×11-5.5= 560÷8=
4.5×4= 12.5×0.8= 35×0.6= 21÷1000=
3.67+1.08= 6.7-2.57= 3-1.08= 37×100÷10=
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