Question

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Explanation:

Problem 3:

Ben left home at 8:15. We analyze each option:

• "15 minutes after 8": 8:00 + 0:15 = 8:15, so this applies.
• "15 minutes before 8": 8:00 - 0:15 = 7:45, which is not 8:15, so this does not apply.
• "quarter after 8": A quarter of an hour is 15 minutes, so quarter after 8 is 8:15, this applies.
• "25 minutes after 8": 8:00 + 0:25 = 8:25, not 8:15, so this does not apply.

Step1: Add the hundreds, tens, and ones separately

First, break down 139 into 100 + 30 + 9. So we can add 370 + 100 + 30 + 9.

Step2: Add 370 and 100

$370 + 100 = 470$

Step3: Add 30 to the result

$470 + 30 = 500$ (this is the jump Clara did as +30)

Step4: Add the remaining 9

$500 + 9 = 509$

Answer:

A. 15 minutes after 8, C. quarter after 8

Problem 4: