Form1 英文數題- 唔該(4條)

1. one-third of his money to buy a toy = $x/3
$20 for food = $20
therefore $x/3+$20 = $37
$x/3 = $37-$20 = $17
$x = $17*3 = $51


2. Let the Width of the rectangle be Ycm
2Y = 72cm-19cm*2
2Y = 72cm-38cm
2Y=34cm
Y = 34cm/2 = 17cm


3. Number of girls wearing glasses = 2/7 * 280 = 80
50℅of the girls wear glasses total number of girls - 80/50*100 = 160


4. Let the smaller number be x.
the larger number = x+2
x + (x+2) = 86
2x+2 = 86
2x = 86-2 = 84
x = 84/2 = 42

1)37-20=17
17蚊係佢全部錢既3分1
17*3=51
佢原本有51蚊

2)wing...你有冇錯打字啊?
我記得闊唔係咁串
(72-19-19)/2=17

3)唔清唔楚= ="

4)2個連續偶數加埋=86
先let small one be x
x+x+2=86
2x=84
x=42
咁咪一個係42,一個係44

1) 1/3x + $20 = $37; 1/3x = $37 - $20; 1/3x = $17; x = $17 x 3 = $51

2) A rectangle has 4 sides. Two of them are always equal. (72cm - (19cm x 2))/2 = 17cm

3) Let X be the number of girls. 50%X = 2/7 * 280; 50%X = 80; X = 80 * 2 = 160

4) x + (x+2) = 86; 2x+2 = 86; 2x = 86 - 2; 2x = 84; x = 84/2 = 42

1) x = 51
3) Girl = 80