Math diary, Unit 4, Mathematics, Grade Four, Last Term.

Today, after I signed up for school and went home, I wrapped the book cover and began to calculate the cost of this semester.

The first is tuition. Tuition fee is 4 10 yuan, plus drinking water fee in 20 yuan, 430 yuan. Next, the charge of the Olympic Mathematics School is 180 yuan. It is estimated that the bus fare is in 20 yuan and ***200 yuan. There is also money to buy exercise books: 2 copies of "Classpass" 2 1.5 yuan; English practice 1 9.9 yuan; 2 copies of Examination Paper Course Pass 15.9 yuan; "Jiangsu Big Test Paper" 3 copies 2 1 yuan. 21.5+9.9+15.9+13+21= 81.3 (yuan).

Study fee: 430+200+81.3 = 711.3 (Yuan).

Living expenses: I will drink about 5 cases of milk this semester, 5×30= 150 yuan. Every meal is about 2~3 yuan, of which 2.5 yuan is 2.5×3×30×5= 1 125 (yuan). "What else?" I bit my pencil and said to myself, "and your school supplies." Hey, mom's home. Yes, and school supplies.

School supplies: a pencil-box 8 yuan, a pencil-box 3 yuan (very cheap, clearance goods), six pencils 3 yuan, an eraser 0.5 yuan, two triangular rulers 1 yuan, two mechanical pencil 5 yuan, 8+3+0.5+ 1+5=20.5 (yuan).

Total expenditure: 711.3+150+1125+20.5 = 2006.8 (yuan).

Wow, I didn't expect that I, who usually don't spend much money, would let my parents spend 2006.8 yuan this semester. It seems that I will save money!

Today, my mother and I went to the supermarket. I jumped into the children's section and stared at the toys. I bought two guns. My mother bought 1 mop for each 8.5 yuan. We spent 27 yuan, mop 27-8.5 * 2 = 10 yuan. After buying, we went home.