直接写结果。

$$
\begin{array}{llll}
230 \times 3= & 15 \times 40= & 12 \times 60= & 300 \times 90= \\
489-80= & 720 \div 8= & 90+430= & 630 \div 7= \\
204 \times 4= & 320 \times 30= & 80 \times 12= & 999 \times 0 \times 6= \\
50 \times 74 \approx & 29 \times 98 \approx & 48 \times 203 \approx & 230 \times 8 \approx
\end{array}
$$
答案: $230 \times 3=690 \quad 15 \times 40=600 \quad 12 \times 60=720 \quad 300 \times 90=27000$

$489-80=409 \quad 720 \div 8=90 \quad 90+430=520 \quad 630 \div 7=90$

$204 \times 4=816 \quad 320 \times 30=9600 \quad 80 \times 12=960 \quad 999 \times 0 \times 6=0$

$50 \times 74 \approx 3500 \quad 29 \times 98 \approx 3000 \quad 48 \times 203 \approx 10000 \quad 230 \times 8 \approx 1600$