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Who won?
2. Work on your own and colour in according to the code: 4 = dark grey ; 5 = pink ; 6 = light grey ; 7 = black ; 9 = red.
3. Complete the tables:
34 | ||||||||
3.1 | Divided by | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Remainders | 1 | ............ | ............ | ............ | ............ | ............ | ............ |
61 | ||||||||
3.2 | Divided by | 2 | 5 | 6 | 7 | 8 | 9 | 10 |
Remainders | 1 | ............ | ............ | ............ | ............ | ............ | ............ |
4. Let us see how well you do in the following mental test. Complete it as quickly and accurately as you can:
4.1 35 – 5 – 5 – 5 = ............ | 4.11 108 – 12 – 12 – 12 = ............ |
4.2 64 – 8 – 8 = ............ | 4.12 72 – 9 – 9 = ............ |
4.3 42 ÷ 7 = ............ | 4.13 Halve: 612: ............ |
4.4 54 ÷ 6 = ............ | 4.14 Halve: 487: ............ |
4.5 ............ ÷ 7 = 8 | 4.15 Halve: 1 036: ............ |
4.6 ............ ÷ 12 = 6 | 4.16 ............ ÷ 9 = 4 |
4.7 28 ÷ 4 = ............ | 4.17 ............ ÷ 8 = 6 |
4.8 280 ÷ 4 = ............ | 4.18 60 ÷ ............ = 5 |
4.9 280 ÷ 40 = ............ | 4.19 36 ÷ ............ = 4 |
4.10 2 800 ÷ 40 = ............ | 4.20 3 600 ÷ 90 = ............ |
DID YOU KNOW?
Division is the inverse of multiplication.
Thus: 5 × 3 = 1515 ÷ 3 = 5 en15 ÷ 5 = 3
When I want to check a division sum, I multiply. When I check a multiplication sum, I divide
1. Now use your knowledge of the "inverse" to complete the following:
1.1 If 26 × 17 = 442, then 442 ÷ 17 = ................ and 442 ÷ ................ = 17
DID YOU ALSO KNOW?
When we divide, we do the following:
REPEATED SUBTRACTION
12 ÷ 3 = 12 – 3 – 3 – 3 – 3 = 4
GROUPING
12 ÷ 3: We must divide 12 into 3 equal groups
DIVISION
12 ÷ 3: We must divide 12 equally between 3
123
1. Let us do revision. Do you remember what happens when we divide any number by 1? Work with a friend and find the answers to the following:
1.1 5 ÷ 1 = .................................. 1.2 86 ÷ 1 = ............................
1.3 359 ÷ 1 = .............................. 1.4 4 625 ÷ 1 = .......................
1.5 32 174 ÷ 1 = .........................
2. Write down a rule for dividing by 1.
BRAIN-TEASER!
If 5 ÷ 1 = 5 and 86 ÷ 1 = 86, then:
1 ÷ 5 = .........................
1 ÷ 86 = .........................
1 ÷ 359 = .........................
1 ÷ 4 625 = .........................
Thus, if 1 is the dividend, then the answer is always a...........................................
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