口算: 12×0.6= 4.5÷ 1 2 = 1 5 - 1 6 = 28×20%= 1.6×
口算:12×0.6=4.5÷12=15-16=28×20%=1.6×34=1÷37=36×14=15÷59=32=0.12=18.84÷3.14=6.28÷3.14=13...
口算: 12×0.6= 4.5÷ 1 2 = 1 5 - 1 6 = 28×20%= 1.6× 3 4 = 1÷ 3 7 = 36× 1 4 = 15÷ 5 9 = 3 2 = 0.1 2 = 18.84÷3.14= 6.28÷3.14= 1 3 - 1 5 = 35× 1 7 = 1-4%= 7÷1.4= 1÷5%= 70%-60%= 80×125%= 2+53%=
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