Adding and subtracting using multiples of 10, 100, 1000, 10 000 and 100 000
Adding and subtracting using multiples of 10, 100, 1000, 10 000 and 100 000
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Lesson details
Key learning points
- In this lesson, we will learn how to use the 'derived facts' and 'make 10' strategies to solve equations involving multiples of 10, 100, 1000, 10 000 and 100 000.
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5 Questions
Q1.
1. Use the 'round and adjust' strategy to solve: 398 + 212.
600
601
620
Q2.
2. Use the 'find the difference by adding on' strategy to complete the equation: 438 + _____ = 620.
160
180
181
Q3.
3. Use the 'partitioning for subtraction' strategy to solve: 487 - 134 =
301
328
377
Q4.
4. Use addition and subtraction to find the missing part of this equation: 124 + ______ + 330 = 754
156
200
209
Q5.
5. Use addition and subtraction to find the missing part of this equation: 389 + ______ + 421 = 924
214
414
814
5 Questions
Q1.
1. Use the derived fact '9-6 = 3' to solve 90 000 - 60 000 = ________.
30
300
300 000
Q2.
2. Use the make 10 strategy to solve: 160 000 + 60 000 = _________.
200 0000
22 000
2200
Q3.
3. Use either the derived facts or make 10 strategy to solve: 18 000 - 15 000 =
30 000
300
300 000
Q4.
150 365 people attend an event. 80 000 people leave early. How many people are left?
100 365
60 365
80 365
Q5.
Which derived fact could help us solve: 14 000 - 9000?
14 + 9 = 23
23 - 9 = 14
5 + 9 = 14