帮我列出综合算式.

问题描述:

帮我列出综合算式.
1.260+78=338 3338x20=6760
2.460×31=14260 1426÷62=230 550+230+=780

1.(260+78)×20
=338×20
=6760
2.550+(460×31÷62)
=550+(14260÷62)
=550+230
=780
亲,选我哦!