Basic Multiplication
What is 40 × 6?
240
What are all the factors of 18?
1, 2, 3, 6, 9, 18
Estimate 391 × 6.
Approximately 2,400 (using 400 × 6).
Solve 56 × 24 using partial products.
56 × 20 = 1,120; 56 × 4 = 224. Total = 1,344
Question: There are 7 boxes with 24 crayons in each box. How many crayons are there altogether?
7 × 24 = 168 crayons
What is 520 × 7?
3,640
What are all the factors of 32?
1, 2, 4, 8, 16, 32
Estimate 618 × 7.
Approximately 4,200 (using 600 × 7).
Solve 38 × 47 using an area model.
30 × 40 = 1,200; 30 × 7 = 210; 8 × 40 = 320; 8 × 7 = 56. Total = 1,786
A teacher buys 8 packs of paper with 45 sheets in each pack. The class uses 76 sheets. How many sheets are left?
8 × 45 = 360; 360 − 76 = 284 sheets
What is 220 x 40?
8,800
What are the first five multiples of 7?
7, 14, 21, 28, 35
Estimate 2,481 × 4.
Approximately 8,000 (using 2,000 × 4).
Solve 126 × 35 using the standard algorithm.
126 × 30 = 3,780; 126 × 5 = 630. Total = 4,410
A school orders 12 boxes of pencils. Each box has 36 pencils. If 89 pencils are given to students, how many pencils remain?
12 × 36 = 432; 432 − 89 = 343 pencils
What is 3,000 x 900?
2,700,000
What are all the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
Estimate 763 × 8.
Approximately 6,400 (using 800 × 8).
Solve 248 × 46 using partial products.
248 × 40 = 9,920; 248 × 6 = 1,488. Total = 11,408
A store receives 24 boxes of trading cards with 125 cards in each box. It sells 875 cards. How many cards remain?
24 × 125 = 3,000; 3,000 − 875 = 2,125 cards
What is 3,600 × 8?
28,800
What is the smallest number that is a multiple of both 6 and 8?
24
Estimate 3,649 × 6.
24,000 (using 4,000 × 6).
Solve 367 × 58 using the standard algorithm.
18,350; 367 × 8 = 2,936. Total = 21,286
A school has 18 classrooms with 28 students in each classroom. Each student receives 4 notebooks. How many notebooks are needed altogether?
18 × 28 = 504 students; 504 × 4 = 2,016 notebooks