PROBLEM SOLVING

PROBLEM SOLVING

by Joannah Layno

Multiple Choice

A book shop carried 135 titles.

64 titles are added to the collection. Should we add or subtract to find the answer?

QUESTION: 135 _ 64 = ?

• +

• -

Multiple Choice

A book shop carried 135 titles.

64 titles are added to the collection. How many titles does it carry now?

QUESTION: 135 + 64 = ???

• It carries 199 titles now.

• It carries 189 titles now.

​Answer

​A bookshop carried 135 titles. 64 titles are added to the collection. Should we add or subtract to find the answer?

​

​We should add to find the answer using the + (plus) sign.

​

​Therefore, 135 + 64 = 199.

​It carries 199 titles.

Multiple Choice

A restaurant had 263 customers on Saturday. It had 216 customers on Sunday. How many customers did it have over the weekend?

Should we add or subtract the answer?

• add (+)

• subtract (-)

Multiple Choice

A restaurant had 263 customers on Saturday. It had 216 customers on Sunday. How many customers did it have over the weekend?

263 + 216 = ___

Solve using the UPAC method.

• It had 479 customers over the weekend.

• It had 469 customers over the weekend.

​Answer

​First Step:

Understand the problem: We have to find the number of customers over the weekend.

• Saturday: 263 customers

• ​Sunday: 216 customers

​Answer

​Second step:

Plan what to do. We can draw a bar model.

​Answer

​Third step:

Work out the answer.

​Answer

​Third step:

Check if your answer is correct.

​If 216 + 263 = 479

​Then, 479 - 216 should equal to 263.

Multiple Choice

Zoe had 210 stamps. Jen had 157 more stamps. How many stamps did Jen have?

Should we add or subtract the answer?

• add (+)

• subtract (-)

Multiple Choice

Zoe had 210 stamps. Jen had 157 more stamps. How many stamps did Jen have?

210 + 157 = ___

Solve using the UPAC method.

• Jen had 360 stamps.

• Jen had 367 stamps.

Multiple Choice

A school has 581 students. 260 of them are boys. How many girls are there?

Should we add or subtract the answer?

• add (+)

• subtract (-)

Multiple Choice

A school has 581 students. 260 of them are boys. How many girls are there?

581 - 260 = ???

Solve using the UPAC method.

• There are 321 girls.

• There are 320 girls.