"56除以8+77等于几"...56除以8+77等于几

　"56除以8+17等于几"...56除以8+17等于几

　"56除以8除以7等于几"...56除以8除以7等于几

　"56除以8+28等于几"...56除以8+28等于几

　"56除以8+38等于几"...56除以8+38等于几

　"57-56除以8等于几"...57-56除以8等于几

　"56除以8+7"...56除以8+7

　"56-8除以8等于几"...56-8除以8等于几

　"56+72除以8等于几"...56+72除以8等于几

　"56除以8+23等于几"...56除以8+23等于几