Unit 2 4th grade

32 x 23 =

• 30 x 2 + 20 x 3

• B. (2 x 3) + (3 x 3 tens) + (2 x 2 tens) + (3 tens x 2 tens)

65 x 52

• (60 x 50) + (50 x 5) + (60 + 2) + (2 x 5)

• 26 + 14 + 55 + 62

7 x 7 = 49

• yes

• no

7 x 700= 49,000

• yes

• no

70 x 70 = 4,900

• yes

• no

7 x 7,000 = 49,000

• yes

• no

700 x 70 = 490,000

• yes

• no

47 x 9 is greater than 40 x 9

• true

• false

6 x 70,000=420,000

• true

• false

An estimate of 47 x 9 is 5000

• true

• false