"428-4除以4等于几"...428-4除以4等于几

　"428除以41等于几"...428除以41等于几

　"428-234除以6等于几"...428-234除以6等于几

　"460-428除以4等于几"...460-428除以4等于几

　"4284除以42等于几"...4284除以42等于几

　"284+196除以4等于几"...284+196除以4等于几

　"434+470除以4等于几"...434+470除以4等于几

　"408除以4+297等于几"...408除以4+297等于几

　"428除以2×3等于几"...428除以2×3等于几

　"428除以40等于几"...428除以40等于几