Number Patterns
The pattern rule is "start at 4, keep adding 4." What is the 5th number?
20 (4, 8, 12, 16, 20)
What is the best estimate for 4,812 × 6?
About 30,000 (5,000 × 6 = 30,000)
Find the value of 6 × 3,251.
19,506
Find the value of 852 ÷ 4.
213
A school orders 325 boxes of crayons. Each box has 8 crayons. How many crayons total?
2,600 crayons (325 × 8 = 2,600)
True or false: In the pattern 5, 10, 15, 20... the numbers switch between even and odd.
False — all numbers are even (multiples of 5 that are also even)
What is the best estimate for 8,103 ÷ 4?
About 2,000 (8,000 ÷ 4 = 2,000)
Find the value of 7 × 4,025.
28,175
Find the value of 936 ÷ 6.
156
A teacher has 186 stickers to share equally among 6 students. How many does each student get?
31 stickers each (186 ÷ 6 = 31)
The pattern is 6, 12, 18, 24… What is the 8th number?
48 (8 × 6 = 48)
What is the best estimate for 3,267 × 9?
About 27,000 (3,000 × 9 = 27,000)
Find the value of 24 × 53.
1,272
Find the value of 4,235 ÷ 5.
847
A garden is 192 square feet. Each bag of mulch covers 8 sq ft. How many bags are needed?
24 bags (192 ÷ 8 = 24)
Using the rule "start at 7, keep adding 7," what is the 10th term?
70 (10 × 7 = 70)
What is the best estimate for 6,489 ÷ 3?
About 2,000 (6,000 ÷ 3 = 2,000)
Find the value of 46 × 38.
1,748
Find the value of 2,814 ÷ 9. What is the remainder?
312 remainder 6
A room is 14 ft × 18 ft. There are 9 boxes of tiles, each covering 30 sq ft. Is that enough?
Area = 252 sq ft. 9 × 30 = 270 sq ft. Yes, that is enough!
In the pattern 4, 8, 12, 16… is 50 in the pattern? How do you know?
No — 50 is not a multiple of 4 (4 × 12 = 48, 4 × 13 = 52)
Without calculating, is 7,214 × 5 closer to 35,000 or 50,000? Explain.
Closer to 35,000 — round 7,214 down to 7,000; 7,000 × 5 = 35,000
Find the value of 57 × 82.
4,674
Find the value of 5,432 ÷ 8.
679
Lin buys 48 packs of markers. Each pack has 12 markers. She gives away 144 markers. How many does she have left?
432 left (48 × 12 = 576; 576 − 144 = 432)