直接写得数。2.27+3.3=10-3 = × =4× ÷ ×4=5.5÷0.11=30×20％=

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2.27+3.3=	10-3 $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =	4× $\text{[math]}$ ÷ $\text{[math]}$ ×4=
5.5÷0.11=	30×20％=	$\text{[math]}$ - $\text{[math]}$ + $\text{[math]}$ =	0.75×99+0.75=

1. 直接写得数。2.27+3.3=10-3 = × =4× ÷ ×4=5.5÷0.11=30×20％= - + =0.75×99+0.75=