Multiples of Ten
50 x 27 =
1,350
Estimate to solve:
18 x 25 =
600
Use an area model to solve:
28 x 36 =
600 + 120 + 240 + 48 = 1,008
16 x 43 =
688
Josiah went to visit a friend every week for 52 weeks. He drove 28 miles on each trip. How many miles did he drive in all?
1,456 miles
89 x 40 =
3,560
Estimate to solve:
33 x 48 =
1,500
Use an area model to solve:
43 x 19 =
400+360+30+27=817
48 x 31 =
1,488
Lana uses 46 rods to make the outline of a design. Each rod is 23 inches long. What is the total length of the rods in inches?
1,058 inches
60 x 99 =
5,940
Estimate to solve:
67 x 42 =
2,800
Use an area model to solve:
32 x 24 =
600+40+120+8=768
52 x 19 =
988
At a store, there are 11 shelves with 27 picture books and 12 shelves with 21 chapter books. How many fewer chapter books than picture books does the store have?
11x27=297
12x21=252
297-252=45 fewer chapter books
54 x 70 =
3,780
Estimate to solve:
78 x 31 =
2,400
Use an area model to solve:
65 x 47 =
2,400+420+200+35=3,055
84 x 37 =
3,108
A large container of laundry detergent costs $17. A washing machine costs 34 times as much. How much does a washing machine and 2 containers of detergent cost?
17x2=$34
17x34=$578
$578+$34=$612
99 x 90 =
8,910
Estimate to solve:
94 x 77 =
7,200
Use an area model to solve:
98 x 73 =
6,300+270+560+24=7,154
67 x 99 =
6,633
Isla made 35 beaded necklaces. Each necklace sells for $27. She spent $385 on supplies to make the necklaces. How much money did Isla make?
35x$27=$945
$945-$385=$560