Maths
2007-08-21 12:01 am
Mrs Lee bought 3kg of pork .She paid $50 and got $8 change . How much did 4kg of pork cost?
回答 (3)
2007-08-21 12:39 am
✔ 最佳答案
首先，我地搵出佢3kg既豬肉要俾幾多錢，我地將佢俾左幾多再減番找番黎果d錢，即係：$50（佢俾ge錢）-$8（找番黎ge錢）
=$42
然後將3kg豬肉要俾ge錢÷3，咁就搵到1kg豬肉要俾ge錢：
$42（3kg豬肉要俾ge錢）÷3
=$14
最後將1kg豬肉要俾ge錢x4，又或者將之前搵到ge 3kg豬肉要俾ge錢+埋1kg豬肉要俾ge錢，就可以計算出買4kg豬肉要俾ge錢la。即係：
$14x4=$56又或者$42（3kg豬肉要俾ge錢)+$14（1kg豬肉要俾ge錢）=$56
所以，買4kg豬肉要俾$56
2007-08-21 12:28 am
1kg of pork:
Let x be how much kg of pork
..............3x=$50-$8
..............3x=$42
................x=$14
than...4kg of pork:
.........................=4($14)
.........................=$56
................................//
Let x be how much kg of pork
..............3x=$50-$8
..............3x=$42
................x=$14
than...4kg of pork:
.........................=4($14)
.........................=$56
................................//
參考: me~~
2007-08-21 12:11 am
money he have paid is = 50-8 =$42
Each kg pork cost = 42 / 3 = $14
So 4 kg pork cost 14 x 4 =$ 56
Each kg pork cost = 42 / 3 = $14
So 4 kg pork cost 14 x 4 =$ 56
收錄日期: 2021-04-23 17:12:12
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