口算 ×2.8 =－×= ÷=÷3==120×= 18××= 1÷= ÷= 0÷=【参考答案】

试题详情

口算

$\text{[math]}$ ×2.8 = $\text{[math]}$ － $\text{[math]}$ × $\text{[math]}$ = $\text{[math]}$ ÷ $\text{[math]}$ = $\text{[math]}$ ÷3= $\text{[math]}$ =

120× $\text{[math]}$ = 18× $\text{[math]}$ × $\text{[math]}$ = 1÷ $\text{[math]}$ = $\text{[math]}$ ÷ $\text{[math]}$ = 0÷ $\text{[math]}$ =

知识点

参考答案