口算2× = 2÷ = 2+ = 2﹣ = ÷ = 0÷ = +25%= 1.2+40%=

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2× $\text{[math]}$ =	2÷ $\text{[math]}$ =	2+ $\text{[math]}$ =	2﹣ $\text{[math]}$ =
$\text{[math]}$ ÷ $\text{[math]}$ =	0÷ $\text{[math]}$ =	$\text{[math]}$ +25%=	1.2+40%=

1. 口算2× = 2÷ = 2+ = 2﹣ = ÷ = 0÷ = +25%= 1.2+40%=