Current location - Training Enrollment Network - Mathematics courses - The second volume of Grade Four, Mathematics, Peking University, 24 pages.
The second volume of Grade Four, Mathematics, Peking University, 24 pages.
There is not one or four main questions on page 24.

Pencil box 12.6 yuan each, eraser 2.45 yuan each, pen 7.50 yuan each, ballpoint pen 2.90 yuan each, schoolbag 35.60 yuan each, ruler 2.85 yuan each.

(1) How much does it cost to buy a pen and ruler?

I have five yuan. Is it enough to buy an eraser and a ballpoint pen?

I bought a pencil-box and a schoolbag, paid 50 yuan, and got the change of 2.20 yuan, right?