"672+174等于几"...672+174等于几

　"657-192等于几"...657-192等于几

　"706+251等于几"...706+251等于几

　"657-269等于几"...657-269等于几

　"672-196等于几"...672-196等于几

　"762+156等于几"...762+156等于几

　"674-275等于几"...674-275等于几

　"672-451等于几"...672-451等于几

　"627+195等于几"...627+195等于几

　"762-267等于几"...762-267等于几