М:5 2/3=1 7/9:1 7/2
М=17/3*16/9*2/9
М=544/243=2 58/243
17 * 2/5 = 6,8
16/25 * 3 /8 = 6,25 = 6,4
1600 * 3/100 = 48
25000 * 7/10 = 17500
45 мин.* 1/3 = 15мин.
90° * 2/3 = 60°
150 : 3/4 = 200
2 5/6 : 2/3 = 17/6 : 2/3 = 17/4 = 4целых 1/4
350 : 2/5 = 875
5 9/10 : 3/5 = 59/10 : 3/5 = 59/6 = 9целых 5/6
1 дм-10 см, то 14*10=140см
2 сторона-140*2=280см
периметр=64*10=640см
280+140= 420
640-420=220см+22дм
ответ:220см!
0.9*-8-0.9*3*4=-7.2-10.8=-18