Let’s solve each problem one by one. We’ll use multiplication because all these problems involve “groups of” or “times as many.”
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Problem 1:
Vanessa sells 65 crab cakes every day. How many will she sell in 20 days?
→ Multiply: 65 × 20
Break it down: 65 × 2 = 130, then add a zero → 1300
✔ Answer:
1300
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Problem 2:
Michelle has 21 photos. Brandon has 15 times more than Michelle.
→ Multiply: 21 × 15
We can do: 20 × 15 = 300, and 1 × 15 = 15 → 300 + 15 = 315
✔ Answer:
315
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Problem 3:
Nicole’s 17 friends each get a bag with 10 candies.
→ Multiply: 17 × 10 = 170
(Just add a zero to 17)
✔ Answer:
170
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Problem 4:
Gerald packed 13 boxes, each with 31 items.
→ Multiply: 13 × 31
Break it down:
10 × 31 = 310
3 × 31 = 93
Add them: 310 + 93 = 403
✔ Answer:
403
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Problem 5:
Daphne plays outside 90 minutes per day for 14 days.
→ Multiply: 90 × 14
Break it down:
90 × 10 = 900
90 × 4 = 360
Add them: 900 + 360 = 1260
✔ Answer:
1260
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Problem 6:
One basket has 34 strawberries. How many in 19 baskets?
→ Multiply: 34 × 19
Think of 19 as (20 - 1):
34 × 20 = 680
Minus 34 × 1 = 34
So: 680 - 34 = 646
✔ Answer:
646
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Final Answer:
1) 1300
2) 315
3) 170
4) 403
5) 1260
6) 646
Parent Tip: Review the logic above to help your child master the concept of 2 digit multiplication worksheet grade 4.
