7.6×2.25+7.6×7.75
=7.6×(2.25+7.75)
=7.6×10
=76
明白请采纳,
有新问题请求助,是7.6+7.75，不是乘（式子后半段）7.6×2.25+7.6+7.75=1.9×4×2.25+7.6+7.75=1.9×9+7.6+7.75=17.1+7.6+7.75=32.45