10:5*3=6
1360:8*4=170*680
20:5*4=4*4=16
345 + 456<span> = </span><span>801
</span>657 − 345<span> = </span><span>312
</span>789 + 876<span> = </span><span>1665
</span>658 + 764<span> = </span><span>1422
</span>534 − 238<span> = </span><span>296</span>