Multiply by counting by 10
Estimate
Numerical and Word Form
Standard Algorithm Multiplication
Word Problems
200

1200 x 20

24,000

200

24 x 55

20 x 60 = 1,200

200

The sum of 10 and 5, times 3

(10 + 5) x 3 = 45

200

22 x 21

462

200

The sum of 9 tens and 7 sixes is 142. Is that true? (Yes or No)

No, the sum would be 132.

300

23 x 20

460

300

913 x 640

900 x 600 = 540,000

300

10 x (2 + 8)

10 times the sum of 2 and/plus 8. 

Answer is 100

300

108 x 35

3,780

300

Larry claims that (14 + 12) x (8 + 12) is the same as (14 x 12) + (8 x 12). Is Larry correct?  Yes or no? SHOW WORK

No, they are not the same.

500

3,310 x 300

993,000

500

8,379 x 541

8,000 x 500 = 4,000,000

500

The multiplication of 14 plus 12 and 8 plus 12.

(14 + 12) x (8 + 12)

26 x 20 = 520

500

314 x 45

14,130

500

John's house payment is $1,632 a month. In 5 years, how much will John have paid on his house? (Hint: Do NOT multiply 1,632 x 5)

12 months is 1 year. 

1 year of payment is $19,584

5 years of payment is $97,920

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