Numbers Year 4 6 Roman numerals negative numbers
+/- Numbers Year 4 -6 – Roman numerals, negative numbers, magic squares and arithmagons www. Key. Stage 2 Maths. com
Find the number halfway between 50 and 70. 50 1) Find the difference. 7 0 -5 0 2 0 60 ? 70 2) Find half the difference. 10 2 2 0 3) Add half the difference to the smallest number. 5 0 +1 0 6 0
Find the number halfway between 52 and 84. 52 1) Find the difference. 8 4 - 5 2 3 2 68 ? 84 2) Find half the difference. 16 1 2 3) Add half the difference to the smallest number. 5 2 + 1 6 6 8
Find the number halfway between 57 and 93. 57 1) Find the difference. 8 1 9 3 - 5 7 36 75 ? 93 2) Find half the difference. 18 2 3 16 3) Add half the difference to the smallest number. 5 7 +1 8 7 5 1
Find the number halfway between 257 and 493. 257 1) Find the difference. 8 1 9 3 4 -2 5 7 23 6 375 ? 493 2) Find half the difference. 118 2 2 3 16 3) Add half the difference to the smallest number. 2 5 7 +1 1 8 37 5 1
Find the number halfway between 344 and 488. 344 1) Find the difference. 4 8 8 -3 4 4 14 4 416 ? 488 2) Find half the difference. 072 2 114 4 3) Add half the difference to the smallest number. 3 4 4 + 7 2 4 16 1
We use the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 in our counting system. In ancient Rome, they used Roman numerals. I = 1 V = 5 X = 10 L = 50 C = 100 They combined these letters to form other numbers.
I = 1 V = 5 X = 10 4 = 1 before 5 = IV 6 = 1 after 5 = VI 9 = 1 before 10 = IX 11 = 1 after 10 = XI 40 = 10 before 50 = XL 60 = 10 after 50 = LX L = 50 C = 100
I = 1 V = 5 X = 10 L = 50 2 = 1 and 1 = II 3 = 1 and 1 = III 7 = 5 and 1 = VII 8 = 5 and 1 = VIII 20 = 10 and 10 = XX 30 = 10 and 10 = XXX C = 100
I = 1 V = 5 X = 10 L = 50 70 = 50 and 10 = LXX 80 = 50 and 10 = LXXX 90 = 10 before 100 = XC C = 100
I = 1 V = 5 X = 10 L = 50 C = 100 12 = XII 19 = XIX 14 = XIV 23 = XXIII 16 = XVI 25 = XXV
I = 1 V = 5 X = 10 35 = XXXIV L = 50 42 = XLII 38 = XXXVIII 44 = XLIV 39 = XXXIX 49 = XLIX C = 100
I = 1 V = 5 X = 10 L = 50 C = 100 55 = LV 76 = LXXVI 59 = LVIX 78 = LXXVIII 64 = LXIV 89 = LXXXIX
I = 1 V = 5 X = 10 L = 50 C = 100 55 = LV 76 = LXXVI 59 = LVIX 78 = LXXVIII 64 = LXIV 89 = LXXXIX
I = 1 V = 5 X = 10 D = 500 L = 50 C = 100 M = 1000 200 = CC 600 = DC 300 = CCC 700 = DCC 400 = CD 800 = DCCC 500 = D 900 = CM
I = 1 V = 5 X = 10 D = 500 L = 50 C = 100 M = 1000 214 = CCXIV 655 = DCLV 309 = CCCIX 771 = DCCLXXI 481 = CDLXXI 893 = DCCCXCIII 590 = DXC 999 = CMXCIX
6 4 11 12 7 2 3 10 8 11 + 6 + 4 = 21 12 + 7 + 2 = 21 10 + 8 + 3 = 21 12 + 6 + 3 = 21 10 + 7 + 4 = 21 11 + 8 + 2 = 21 8 + 7 + 6 = 21 11 + 7 + 3 = 21
20 23 14 13 19 25 24 15 18 20 + 19 + 18 = 57 57 - 19 - 15 = 23 57 – 23 – 20 = 14 57 – 18 – 14 = 25 57 – 25 – 19 = 13 57 – 20 – 13 = 24
6 4 11 12 7 2 3 10 8 12 is 5 more, 2 is 5 less 10 is 3 more, 4 is 3 less 8 is 1 more, 6 is 1 less 11 is 4 more, 3 is 4 less
26 10 24 18 20 22 16 30 14 24 + 20 + 16 = 60 26 + 20 + 14 = 60 60 - 24 - 14 = 22 60 – 16 – 14 = 30 60 – 30 – 20 = 10 60 – 22 – 20 = 18
21 10 8 15 11 20 14 9 16 13 6 19 7 18 17 12 16 + 13 + 6 + 19 = 54 21 15++++17 69====34 42 8 +++19 18 9 11 15 15 620 17 8 13 12 14 12 36 40 43 44 47 36 47 40 43 34 18 7 14 11 20 54 – 44 42 = 10 12
Start at 3. Count back 5. What number do you reach? -2 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at 4. Count back 8. What number do you reach? -4 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at 9. Count back 12. What number do you reach? -3 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at 5. Count back 10. What number do you reach? -5 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at -1. Count on 4. What number do you reach? 3 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at -2. Count on 5. What number do you reach? 3 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at -6. Count on 8. What number do you reach? 2 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
Start at -4. Count on 12. What number do you reach? 8 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
-8 -6 -4 2 -14 -13 -12 -11 -10 -9 4 -8 -7 -6 -5 -2 0 8 10 6 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
12 9 -3 -6 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 6 -4 3 0 -9 -12 -15 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
14 11 8 -1 -4 -7 -10 -13 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 5 1 2 3 4 5 6 2 7 8 9 10 11 12 13 14
What temperature is 8˚C more than -5˚C? 3˚C -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 -5˚C + 5˚C = 0˚C + 3˚C = 3˚C 1 2 3 4 5 6 7 8 9 10
What temperature is 7˚C less than 3˚C? -4˚C -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 3˚C - 3˚C = 0˚C - 4˚C = -4˚C 1 2 3 4 5 6 7 8 9 10
What is the difference in temperature between the two thermometers? 8˚C -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 ˚C -5 + 5 = 0 0 + 3 = 3
What is the difference in temperature between the two thermometers? 15˚C -20 -16 -12 -8 -4 0 4 8 12 16 20 ˚C -10 -20 -16 -12 -10 + 10 = 0 0 + 5 = 5 5
-3 -6 3 4 -2 -8 -7 2 -1
5 12 7 7 + 5 = 12 9 + 5 = 14 9 + 7 = 16 14 16 9
5 7 2 6+2=8 11 - 6 = 5 5+2=7 11 8 6
7 13 6 7 + 5 = 12 13 – 7 = 6 6 + 5 = 11 12 11 5
7 18 11 11 15 18 + 15 + 11 = 44 44 ÷ 2 = 22 22 – 15 = 7 22 – 18 = 4 22 – 11 = 11 4
11 25 14 24 27 27 + 25 + 24 = 76 76 ÷ 2 = 38 38 – 27 = 11 38 – 25 = 13 38 – 24 = 14 13
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