Welcome to Year 3 Mathematics
Lessons & Assignments
In number patterns, we can find the pattern by looking at:
1) whether the number gets bigger or smaller
2) by subtracting the next big number and the smaller number.
EXAMPLE 1. Counting on / back in 1s
3127
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3128
3129
3130
3131
+1
+1
+1
+1
-1
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-1
-1
-1
EXAMPLE 2. Counting on / back in 2s
1083
1085
1087
1089
1091
+2
+2
+2
+2
-2
-2
-2
-2
EXAMPLE 3. Counting on / back in 5s
9000
9005
9010
9015
9020
+5
+5
+5
+5
-5
-5
-5
-5
EXAMPLE 4. Counting on / back in 10s
+10
+10
+10
+10
4438
4448
4458
4468
4478
-10
-10
-10
-10
EXAMPLE 5. Counting on / back in 50s
+50
-50
+50
+50
-50
-50
+50
-50
7100
7150
7200
7250
7300
EXAMPLE 6. Counting on / back in 100s
+100
+100
+100
+100
-100
-100
-100
-100
8350
8450
8550
8650
8750
EXAMPLE 7. Counting on / back in 500s
-500
-500
-500
-500
7500
8000
8500
9000
9500
+500
+500
+500
+500
EXAMPLE 8. Counting on / back in 1000s
+1000
+1000
+1000
+1000
60
1060
2060
3060
4060
-1000
-1000
-1000
-1000
COUNT ON means ADD
&
COUNT BACK means SUBTRACT
Next, we will get to know what is 'Less than' and 'more than'
a)
+1
5202
1 )
5204
B)
-1
+1
5205
2 )
Example 1.
For Question 1), we can find the answer in two ways:
A) 1 more than 5202 is ?
= 5202 + 1 = 5203
OR
B) 1 less than 5204 is ?
= 5204 - 1 = 5203
Example 2.
2) 1 more than 5205 is ?
= 5205 + 1 = 5206
+500
1573
1 )
2573
2 )
3573
-500
Example 3.
1) 500 more than 1573 is ?
= 1573 + 500 = 2073
Example 4.
2) 500 less than 3573 is ?
= 3573 - 500 = 3073
+1000
60
1060
1 )
3060
-1000
2 )
Example 5.
1) 1000 less than 3060 is ?
= 3060 - 1000 = 2060
Example 6.
2) 1000 more than 3060 is ?
= 3060 + 1000 = 4060