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Lesson 4: Multiplying by tens

# Multiplying by tens word problem

Lindsay multiplies 90 times 5 to solve a word problem. Created by Lindsay Spears.

## Want to join the conversation?

• so would this question be right? 50x4=200?
• Yes, you're right.
Here are my steps, broken down:
50 ×4
5×10 ×4
Here you can switch the order of the numbers due to the commutative property:
5×4×10
We know 5×4=20, so 5×4 ×10 = 200.
• isnt 90 times 5 the same as adding 90 5 times?
• Multiplication is just that.
• so am I right 500x4=2,000
• yessssssssssssss sirrrrr
(1 vote)
• hi I am a human
• UM everyone knows that you're a human unless you're an NPC (bot) which is not needed
• You know multiple right 😨
• Guys does 70 times 5 equal 7 times 5 (which is 35) plus a 0 at the end?
• Yes. You can solve that way too (not add zero add x10). You will get the same answer🫠
(1 vote)
• Sal is better make Sal in more videos