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प्रश्न
Circle the correct division fact (by using method of casting out nine).
1580 ÷ 20 = 78
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उत्तर
1580 ÷ 20 = 78
1 + 5 + 8 + 0 ÷ 2 + 0 = 7 + 8
14 ÷ 2 = 15
14 = 15 × 2 = 30
14 = 30
5 = 3
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संबंधित प्रश्न
Circle the multiples of 9 (by using casting out nine).
13476
Circle the correct subtraction fact (by using casting out nine).
7420 − 3625 = 3795
Circle the correct subtraction fact (by using casting out nine).
2362 – 632 = 1720
Circle the correct multiplication fact (by using method of casting out nine).
312 × 36 = 11232
Circle the multiples of 9
25, 27, 35, 36, 45, 46, 54, 55
Look at the calendar below.
Let us mark 3 × 3 boxes (9 dates) on the calendar and see some magic.
| Take the smallest number | 3 |
| Add 8 to it | +8 |
| = | 11 |
| Multiply it by 9 | ×9 |
| Total | 99 |
Now you choose any 3 × 3 boxes from a calendar and find the total in the same way.
Now try doing it with some other number and also take a different number to add at each step.
What if someone gives you to add ten numbers together?
Did you notice some pattern in the answers?
Take the first two odd numbers. Now add them, see what you get. Now, at every step, add the next odd number.|
How far can you go on?
Now make your own number surprises.
