有一個ｂｌｏｇ友二年級數學評估題

peacenhope

>>>> 325

我覺得係考耐性啫。

Yingmom

==> 325
ok wor，冇咁死板，又可以引導小朋友去思考，幾好玩呀。

原帖由 00adafan 於 08-11-5 23:54 發表
真係好鬼深：
寫出一個比300大，又400小的三位數，三個數之和是10，個位的數字等於百位和十位的數字之和

好似數學推理！

hinhin.mami

好彩識計o者.

kls12

原帖由 hinhin.mami 於 08-11-6 10:42 發表
好彩識計o者.

300 to 400 -> the hundred digit should be 3.

In formula :
3 + x + y = 10
3 + x = y

In Primary 2, will should use "try and error"
by using 3 + x = y
trying x from 0 to 6

only x=2 and y=5 can match 3 + x + y = 10

Is it too difficult to a primary 2 student ?