1.
Use mental multiplication.
3 × 400
A.
1,200
B.
3,400
C.
120
D.
12,000
Hint
2.
Use mental multiplication.
7 × 60
A.
420
B.
4,200
C.
607
D.
760
Hint
3.
Use mental multiplication.
100 × 24
A.
24,000
B.
124
C.
240
D.
2,400
Hint
4.
Use mental multiplication.
600 × 300
A.
900
B.
1,800
C.
180,000
D.
18,000
Hint
5.
Tell which expression represents the number of zeros in the product 600 ×70.
A.
2 + 1 = 3
B.
2 × 1 = 2
C.
3 + 2 = 5
D.
6 + 7 = 13
Hint