直接写出得数。4× = ÷60%= ÷3=&

1. 直接写出得数。
4× $\text{[math]}$ = $\text{[math]}$ ÷60%= $\text{[math]}$ ÷3= 4.2× $\text{[math]}$ = $\text{[math]}$ ÷ $\text{[math]}$ =
12÷ $\text{[math]}$ = $\text{[math]}$ + $\text{[math]}$ = $\text{[math]}$ × $\text{[math]}$ + $\text{[math]}$ = $\text{[math]}$ × $\text{[math]}$ × $\text{[math]}$ = （ $\text{[math]}$ - $\text{[math]}$ ）×20=