Question posted by Tina from Singapore:
Grade/Level: Primary 2
Question: PLEASE TELL ME HOW TO EXPLAIN THIS WORD PROBLEM TO MY PRIMARY TWO DAUGHTER. THIS PROBLEM WAS ON THE E-PORTFOLIO ASK-N-LEARN WEB PAGE OF HER PRIMARY SCHOOL WEBSITE.
QNS) DELVIN AND CHRISTINE COLLECTED 46 SEASHELLS. DELVIN COLLECTED 4 MORE SEASHELLS THAN CHRISTINE. HOW MANY SEA SHELLS DID DELVIN COLLECT?
ANS) THE ANSWER ON THE ASK-N-LEARN E-PORTFOLIO IS DELVIN COLLECTED 25 SEASHELLS.
I DREW THE MODEL FOR THE SUM.
I SOLVED THE SUM USING SIMULTANEOUS EQUATION METHOD.
DELVIN IS X AND CHRISTINE IS Y
Christine is 21 so delvin is 21+4=25
how can i explain this method to a primary two student. please advise
Step 1: Draw 2 identical boxes to show that Delvin and Christine had the same number of seashells.
Step 2: Draw an additional box to the right of Delvin's box and label it "4" to show that she had 4 more seashells than Christine.
Step 3: Since the total number of seashells they had was 46, draw a bracket to the right to show the total "46". Then draw another bracket on top of Delvin's 2 boxes to show that that was what Delvin collected.
From the model,
46 - 4 = 42
42 / 2 = 21
21 + 4 = 25
Thus, Delvin had collected 25 seashells