We at Matrix Math and Model Math have curated a comprehensive list of frequently tested Primary 3 heuristic concepts to assist students in comprehending the fundamental building blocks that constitute complex heuristic problem sums. By mastering the concepts featured in our series of educational videos, we are confident that students can significantly enhance their mathematical proficiency and excel in this subject. We aim to provide weekly updates to this page, so please visit us regularly for new learning materials.

### Primary 3

#### Math Tuition Lesson 20

###### Quantity difference and internal transfer

John had $86 more than Peter at first. How much money must John give to Peter so that he will only have $42 more than Peter?

###### Quantity external transfer, Before Change After

Yenni and Anna had the same amount of money at first. After Yenni used $23 and Anna used $13, the amount of money Anna had left was thrice that of Yenni. How much money did Anna have at first?

###### Quantity internal transfer

Amber and Yenni had the same amount of money. After Amber gave Yenni $222, she was left with $6088.

(a) How much money did Amber have at first?

(b) How much more money did Yenni have than Amber in the end?

#### Math Tuition Lesson 21

###### Measurement, Part and whole

Amber had 5 m 24 cm of ribbon. She used 28cm to tie a bow and some to tie a present. In the end, she had 50 cm of ribbon left. What was the length of the ribbon that she used to tie the present?

###### Measurement, working backwards

Peter had some water in a tank. He poured away 2 L 450 ml and there was 3 L 30 ml left in the tank. How much water was in the tank at first?

###### Part and whole

7843 people were watching a football match. 2142 were women and the rest were men. How many more men than women were there?

#### Math Tuition Lesson 28

###### Fraction with part and whole

(a) Which care centre received less money?

(b) How much money did Elderly Care Centre receive?

(c) How much money did Children Care Centre receive?