Question

Помогите решить!! а) 3/8:9/16= б) 4 --- 1/2: 5--- 1/4=?в)48:12/13=?г)15/16:5=?д)4---3/4:1/4-2---3/14+7=?Очень трудно для меня!))

Answer 1

а)3/8:9/16=3/8*16/9=2/3
б)4 -1/2:5 -1/4=9/2:21/4=9/2*4/21=6/7
в)48/1:12/13=48/1*13/12=52/1=52
г)15/16:5/1=15/16*1/5=3/16
д)4 3/4 : 1/4 - 2 3/14 * 7 = 3 1/2
4 3/4 ÷ 1/4 - 2 3/14 * 7 = 19/4 ÷ 1/4 - 31/14 * 7 = 19/4 * 4 - 31/14 * 7 = 19 - 31/14 * 7 = 19 - 31/2=(19*2 - 31*1)/2 = (38 - 31)/2 = 7/2 = 3 1/2

Answer 2

a)6/16*16/9=2/3
б)4-0,5:5-0,25=4-1-0,25=2,75
в)48:12/13=52
г)15/16:6=15/16*16/96=6,4

Answer 3

а) 3/8:9/16 = (3/8) * (16/9) = 6/9 = 2/3
б) 4 1/2 : 5 1/4 = (9/2) : (21/4) = (9/2) * (4/21) = 2/3
в) 48 : (12/13) = 48 * (13/12) = 52
г) 15/16 : 5 = (15/16) * (1/5) = 3/64
д) 4 3/4 : 1/4 - 2 3/14 + 7 = (19/4) / (1/4) - (31/14) + 7 = 19 - (31/14) + 7 = 53/14