口算5×0.9= 0.42÷7= 0.4÷8= 3.9×0= 86÷0.1= 30×0.05= 20+12.3= 54÷0.9= 6.3÷0.7= 9
口算5×0.9=0.42÷7=0.4÷8=3.9×0=86÷0.1=30×0.05=20+12.3=54÷0.9=6.3÷0.7=9.54+0.46=10-0.1=1.5...
口算5×0.9= 0.42÷7= 0.4÷8= 3.9×0= 86÷0.1= 30×0.05= 20+12.3= 54÷0.9= 6.3÷0.7= 9.54+0.46= 10-0.1= 1.5-0.01= 0.8×6= 3.8×0.5= 45÷0.45= 1.3+0.7= 1 5 + 2 5 = 1 9 + 5 9 = 1- 3 26 = 1 3 - 1 4 =
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