直接写得数 1+30%= 20÷0.1%= +×5= += ÷= ××=

$\text{[math]}$ $\text{[math]}$

解方程未知容易

7× $\text{[math]}$ =	$\text{[math]}$ =	4.2× $\text{[math]}$ =	$\text{[math]}$ =
$\text{[math]}$ =	$\text{[math]}$ =	$\text{[math]}$ ×0.8=	$\text{[math]}$ ×0=

口算与估算未知容易

解决问题未知容易

36× $\text{[math]}$ = 18÷ $\text{[math]}$ = 7× $\text{[math]}$ = $\text{[math]}$ =

$\text{[math]}$ $\text{[math]}$ $\text{[math]}$ $\text{[math]}$

口算与估算常考题普通

15÷ $\text{[math]}$ = 30- $\text{[math]}$ = 120× $\text{[math]}$ =

$\text{[math]}$ = $\text{[math]}$ = 60÷20%=

口算与估算常考题普通

12× $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =	0.36× $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =	7.8× $\text{[math]}$ =	4.9× $\text{[math]}$ =	$\text{[math]}$ ×3=