Multiply by Tens/Estimate Products
Multiply Using Zeros:
60 x 60 =
3,600
16 x 14 =
224
12 x 34 =
408
12 x 32 =
384
Bianca and Alison helped pack shirts to donate to a charity. Bianca packed 15 boxes with 10 shirts in each box. Alison packed 11 boxes with 12 shirts in each box. How many more shirts did Bianca pack?
Bianca: 15 x 10 = 150
Alison: 11 x 12 = 132
150 - 132 = 18
Bianca packed 18 more shirts
Multiply Using Zeros:
12 x 30 =
360
21 x 25 =
525
22 x 43 =
946
11 x 42 =
462
Bobby and Abby helped pack books to donate to a charity. Bobby packed 25 boxes with 20 books in each box. Abby packed 21 boxes with 15 books in each box. How many more books did Bobby pack?
Bobby: 25 x 20 = 500
Abby: 21 x 15 = 315
500 - 315 = 185
Bobby packed 185 more books
Multiply Using Zeros:
22 x 40 =
880
24 x 15 =
360
25 x 62 =
1,550
36 x 12 =
432
A grocer order 32 cases with 28 small cans of fruit in each case. The grocer also order 24 cases with 18 large cans of fruit in each case. How many more small cans of fruit did the grocer order?
Small Cans: 32 x 28 = 896
Large Cans: 24 x 18 = 432
896 - 432 = 464
464 small cans of fruit
Estimate the Product:
78 x 21 =
80 x 20 = 1,600
26 x 18 =
468
46 x 52 =
2, 392
43 x 29 =
1,247
Rebecca rode her bike 16 miles each day for 30 days. Michael rode his bike 25 miles for 28 days. Who rode farther? How much farther?
Rebecca: 16 x 30 = 480
Michael: 25 x 28 = 700
700 - 480 = 220
Michael rode 220 more miles
Estimate the Product:
59 x 46 =
60 x 50 = 3,000
64 x 32 =
2,048
85 x 72 =
6,120
51 x 47 =
2,397
A library ordered 17 cases with 24 books in each case. In 12 of the cases, 18 books were fiction books. The rest of the books were nonfiction. How many nonfiction books did the library order?
Number of books ordered: 17 x 24 = 408
Number of fiction books: 12 x 18 = 216
408 - 216 = 192
192 nonfiction books