计算。 0.56÷0.8＝＝＝＝ 5×（）＝ 30×＝ 0.53＝ 3﹣＝

54+999= 2.4× $\text{[math]}$ = 0.4²+0.5²= 6× $\text{[math]}$ ÷ $\text{[math]}$ ×6=

20÷0.1= 5.43-1.3= $\text{[math]}$ ÷13= 1.75+0.8+0.25=

口算与估算容易

1﹣1÷2＝	2.5+3.8＝	$\text{[math]}$
$\text{[math]}$	0.4×3.1×2.5＝	$\text{[math]}$

口算与估算容易

18×20= 12.5×0.4= 1-0.05= 0.3²=

2- $\text{[math]}$ = $\text{[math]}$ + $\text{[math]}$ = 4.8× $\text{[math]}$ = $\text{[math]}$ ÷ $\text{[math]}$ =

12-4.12-5.88= $\text{[math]}$ × $\text{[math]}$ ÷ $\text{[math]}$ × $\text{[math]}$ =

口算与估算容易

$\text{[math]}$ ﹣ $\text{[math]}$ =	$\text{[math]}$ ×6=	5﹣0.25+0.75=	13×（2+ $\text{[math]}$ ）=
0.4²﹣0.3²=	341﹣103=	23.9÷8≈	7× $\text{[math]}$ ÷7× $\text{[math]}$ =

计算题普通

10-7.8= $\text{[math]}$ +2020= 0÷ $\text{[math]}$ = $\text{[math]}$ × $\text{[math]}$ =

11.5-（0.5+3.7）= $\text{[math]}$ × $\text{[math]}$ ÷ $\text{[math]}$ × $\text{[math]}$ =

计算题普通

计算题普通

0.5×0.4=	1.4+0.72=	0.8+1.3-0.8+1.3=	400÷25÷8=
0.3³=	$\text{[math]}$ ÷ $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ ÷ $\text{[math]}$ × $\text{[math]}$ =	1- $\text{[math]}$ + $\text{[math]}$ =

填空题普通

1÷ $\text{[math]}$ =	0.87÷0.01=	1.56÷2.5÷4=	$\text{[math]}$ ÷ $\text{[math]}$ =
3²÷2²=	(20-12)²=	7070÷35=	$\text{[math]}$ ×8÷ $\text{[math]}$ ×8=