Grade 4 - Progress in Mathematics

23.How many ways can you separate the figure in exercise 23 in order to find its area? Describe all the possible ways. 24.A rect ...

from WHO HASN’T PLAYED GAZINTAS? In your arithmetics the problemis what sticks. The language isn’t bound by spelling, but by sou ...

Division Patterns 12-1 Look for a pattern to find each quotient. 9
1 2. 8
4 3. 56
7 90
10 80
40 560
70 900
10 800 ...

Divide mentally. 40
20 11. 20
10 12. 60
20 13. 70
10 360
90 15. 420
60 16. 560
80 17. 250
50 200
40 19. 300
...

Divisors: Multiples of Te n 12-2 3 40
 1  3  7
3 40
 1  3  7 1 2 0 3 R 17 40
 1  3  7 1 2 0 1 7 4 0
3 1 2 0 ...

Divide and check. 40
 6  6  6. 80
 9  8  7. 20
 7  8  8. 50
 8  5  9. 30
 7  7  70
 3  5  6  11. 90
 ...

Estimate Quotients 12-3 Write the compatible numbers you would use to estimate the quotient. Then estimate. 63
21 2. 89
32 ...

Estimate the quotient. Use compatible numbers. 95
35 18. 87
43 19. 62
12 20. 59
28 49
25 22. 81
21 23. 91
29 24. ...

12-4 4 2 2
 9  2
4 22
 9  2 8 8 4 R 4 2 2
 9  2 8 8 4 2 2
4 8 8  4 9 2 Terry had 4 flower baskets. There were 4 ...

Complete each division. 2 3 R 2 R? R 24
 4  8  2. 25
 9  6  3. 44
 8  9  4. 21
 9  4 
48
??
88
84 ? 21? ...

Three-Digit Dividends 12-5 There are 158 people who want to take a boat ride on the lake. How many trips with 45 passengers can ...

Complete each division. 6 9 R 4 R? R 51
 3  0  6  2. 46
 4  1  9  3. 83
 3  9  2  4. 64
 5  3  3 
???
??? ...

Trial Quotients 12-6 Sometimes the quotient you try is too large. When this happens, you need to change the estimate. Divide: 17 ...

Complete each division. 43 R $ 6 .07 $ 6 .06 27
 8  2  27
 8  2  2. 48
$ 2 .8 8  48
$ 2 .8 8  108
81 3 36 ...

Greater Quotients 12-7 4 2 2
 9  9  5
4 22
 9  9  5 8 8 4 5 2 2
 9  9  5 8 8 1 15 4 5
2 2 9 0 9 0 0 9 9 0  ...

Complete each division. 26 2? R 2? ?8 R 34
 8  8  4  2. 42
 8  9  0  3. 17
 3  5  7  4. 19
 5  3  6 
??
? ...

Four-Digit Dividends 12-8 88 6 6 4
 5  4  8  1
5 1 2 2 3 6 1 2 3 8 4 8 8 5 R 41 6 4
 5  4  8  1
5 1 2 2 3 6 1 2
3 2 ...

Complete each division. 24 R 46 R ?? R 51
 1  2  7  3  2. 24
 1  1  0  7  3. 33
 2  1  7  9 
102
96
198 ...

Zero in the Quotient 12-9 ? Think 14
2  8  6  5  14
2 Not enough thousands 14
2  8  6  5  14  28 Enough hundreds D ...

? Complete each division. 60 102 $ 2.0? 3?? R 35
 2  1  0  0  2. 57
 5  8  1  4  3. 18
$ 36 .9 0  4. 24
 7 ...