8/12/20
Today we are going to go trough the answers for the maths we did yesterday. First I will tell you the answer and we will see who got it correct and who didn't we will then look at a method of how to get the write answer.
So lets start
1. 120
Method : Work from left to right.
Step 1 - 4 x 3 = 12
Step 2 - 12 x 10 = 120
2. 339
Method : Use the column method
| 2 | 7 | 6 | |
| + | 1 | 6 | 3 |
| 3 | 3 | 9 |
3. 8/7 or 1 and 1/7
Method : Add the numerators (number on top), keep the denominator (number at the bottom) the same.
6 + 2 = 8
4. 307
Method : Any number when divided by 1 equals the original number
5. 23
Method : Use the column method
Step 1 - 8 - 5 = 3
Step 2 - 4 (40) - 2 (20) = 2 (20)
6. 5.99
Method : Use the column method
| 3 | . | 8 | 0 | |
| + | 2 | . | 1 | 9 |
| 5 | . | 9 | 9 |
7. 30,000
Method : Partition the number
8. 372
Method :
Step 1 - 6 x 2 = 12
Step 2 - 6 x 60 = 360
Step 3 - 360 + 12 = 372
9. 7
Method : Split 63 equally into 9 groups
10. 616
Method : Use the column method
| 1 | 5 | 4 | |
| + | 4 | ||
| 2 | 1 | ||
| 6 | 1 | 6 |
11. 2078
Method : Use the column method. Remember to exchange correctly.
Step 1 - 6 - 8 = Can't do. So exchange from the Tens (3 - this would then become 2). So now 16 - 8 = 9
Step 2 - 2 - 5 = Can't do. Se exchange from the Hundreds (5 - This would then become 4). So now 12 - 5 = 7
Step 3 - 4 - 4 = 0
Step 4 - 2 - 0 = 2
12. 3/5
Method : Convert the mixed number into an improper fraction then subtract.
Step 1 - Convert the mixed number into an improper fraction.
1 and 2/5 as a improper fraction would be 7/5
Step 2 - 7/5 - 4/5 = 3/5 (Remember to keep the denominator the same and just subtract the numerator).
13. 1735
Method : Complete the inverse (switch it around).
Step 1 - Flip the question around so the box is at the end.
1635 + 100 =
Step 2 - Solve 1635 + 100 = 1735
14. 44
Method : Use BIDMAS
Step 1 - Brackets - (32 divided by 8) How many 8 in 32 = 4
Step 2 - Only operation left is Addition so 40 + 4 = 44
15. 6/35
Method : Multiply the numerator by the numerator then multiply the denominator by the denominator.
Step 1 - 2 x 3 = 6
Step 2 - 5 x 7 = 35
16. 31
Method : Write down times table at the side
Step 1 - Work out 16 times table.
1 x 16 = 16
2 x 16 = 32
3 x 16 = 48
4 x 16 = 64
5 x 16 = 80
6 x 16 = 96
7 x 16 = 112
8 x 16 = 128
9 x 16 = 144
10 x 16 = 160
Step 2 - How many 16's in 4? 0 (carry the 4 over)
Step 3 - How many 16's in 49? 3 r1 (carry the 1 over)
Step 4 - How many 16's in 16? 1
Answer 31