解:348+268+152等于( 768 )
∵已知需求出348+268+152等于多少
A + B + C = A + C+ B
∴348 + 268 + 152
= (348 + 152)+ 268
= 500 + 268
= 500 + (300 - 32)
= 500 + 300 - 32
= 800 - 32
= 768
答:348+268+152等于768
解:348+268+152
=(348+152)+268
=500+268
=768