直接写得数。0.77+0.33= ×4+4× =6×30％= + =

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0.77+0.33=	$\text{[math]}$ ×4+4× $\text{[math]}$ =	6×30％=	$\text{[math]}$ + $\text{[math]}$ =
$\text{[math]}$ - $\text{[math]}$ ×0=	$\text{[math]}$ × $\text{[math]}$ =	a- $\text{[math]}$ a× $\text{[math]}$ =	8× $\text{[math]}$ ÷8× $\text{[math]}$ =

1. 直接写得数。0.77+0.33= ×4+4× =6×30％= + = - ×0= × =a- a× =8× ÷8× =