Math 1A Workbook Exercise 45-48 Singapore Part 14-1
1A Workbook Exercise 45-48
Exercise 45
1.
Complete the tables.
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Add 0
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Add 1
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Add 2
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11
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14
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12
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13
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17
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16
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20
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13
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10
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14
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19
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18
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19
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15
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14
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12
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18
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11
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Subtract
0
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Subtract
1
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Subtract
2
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15
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17
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10
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19
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14
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19
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11
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20
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16
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17
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15
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11
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13
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18
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20
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10
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12
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13
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Add 0
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Add 1
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Add 2
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11
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11
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14
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15
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12
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14
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13
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13
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17
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18
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16
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18
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20
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20
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13
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14
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10
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12
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14
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14
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19
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20
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18
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20
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19
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19
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15
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16
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14
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16
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12
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12
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18
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19
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11
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13
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Subtract
0
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Subtract 1
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Subtract
2
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15
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15
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17
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16
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10
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8
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19
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19
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14
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13
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19
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17
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11
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11
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20
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19
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16
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14
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17
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17
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15
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14
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11
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9
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13
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13
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18
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17
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20
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18
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10
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10
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12
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11
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13
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11
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2.
Fill in the missing numbers (as per workbook picture).
Solution:
Click Here to view the solution.
Exercise 46
1.
Match.
Solution:
Click Here to view the solution.
2.
Add or subtract.
9 + 5 =
7 + 4 =
15 – 9 =
16 – 8 =
5 + 7 =
12 – 6 =
11 – 3 =
13 – 7 =
9 + 3 =
14 – 5 =
4 + 8 =
8 + 5 =
Solution:
9 + 5 = 14.
7 + 4 = 11.
15 – 9 = 6.
16 – 8 = 8.
5 + 7 = 12.
12 – 6 = 6.
11 – 3 = 8.
13 – 7 = 6.
9 + 3 = 12.
14 – 5 = 9.
4 + 8 = 12.
8 + 5 = 13.
Exercise 47
1.
Add or subtract. Then color the spaces with the answer 16. Then you will find a
path to bring Miss Ladybird home (Details in solution).
Solution:
Click Here to view the solution.
Exercise 48
1.
Write + or – instead of ⚪.
10 ⚪ 4 =
6.
10 ⚪ 4 =
14.
9 ⚪ 9 =
18.
8 ⚪ 8 =
0.
9 ⚪ 6 =
15.
7 ⚪ 7 =
14.
15 ⚪ 8 =
7.
12 ⚪ 9 =
3.
16 ⚪ 6 =
10.
17 ⚪ 3 =
20.
Solution:
10 - 4 = 6.
10 + 4 = 14.
9 + 9 = 18.
8 - 8 = 0.
9 + 6 = 15.
7 + 7 = 14.
15 - 8 = 7.
12 - 9 = 3.
16 - 6 = 10.
17 + 3 = 20.
2. Write a number
sentence for each following set.
(a) 12, 8, 4, =, +
(b) 9, 14, 5, +, =
(c) 7, 9, 16, -, =
(d) 8, 13, 5, -, =
Solution:
(a) 8 + 4 = 12.
(b) 9 + 5 = 14.
(c) 16 – 9 = 7.
(d) 13 – 8 = 5.
3. Write 4 (four) number
sentences for each picture.
For 1st picture:
7 + 6 = 13.
8 + 5 = 13
13 – 6 = 7.
1 3 – 5 = 8.
For 2nd picture:
11 + 5 = 16.
5 + 11 = 16.
16 – 5 = 11.
16 – 11 = 5.