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How good are you at adding and subtracting hundreds?
Addition and Subtraction 7
This Math quiz is called 'Addition and Subtraction 7' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.
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In this quiz you are going to get some practice in adding and subtracting hundreds.TIP: With numbers less than 1,000, add the hundreds first, then the tens and then the units. For example:
- 120 + 360 + 22 + 8 = (100 + 300) + (20 + 60 + 20) + (2 + 8) = 400 + 100 + 10 = 510
In each of the following questions, what is the answer to the given problem?
1 .
345 + 450 - 200 = ?
597
598
596
595
345 + 450 - 200 = (300 + 400 - 200) + (40 + 50) + (5) = 500 + 90 + 5 = 595
2 .
400 - 389 - 400 + 567 = ?
177
178
180
176
400 - 389 - 400 + 567 = (500 - 300) + (60 - 80) + (7 - 9) = 200 - 20 - 2 = 178
3 .
123 + 56 + 684 - 3 = ?
870
880
860
890
TIP: With numbers less than 1,000, add the hundreds first, then the tens and then the units. 123 + 56 + 684 - 3 = (100 + 600) + (20 + 50 + 80) + (3 + 6 + 4 - 3) = 700 + 150 + 10 = 860. You can repeat the procedure if you are having difficulty in doing it in your head
4 .
238 - 78 - 45 + 167 = ?
228
282
283
284
238 - 78 - 45 + 167 = (200 + 100) + (30 - 70 - 40 + 60) + (8 - 8 - 5 + 7) = 300 - 20 + 2 = 282
5 .
234 - 68 + 2 + 13 = ?
180
182
181
183
234 - 68 + 2 + 13 = (200) + (30 - 60 + 10) + (4 + 2 + 3 - 8) = 200 - 20 + 1 = 181
6 .
234 - 450 + 389 = ?
170
174
175
173
234 - 450 + 389 = (200 - 400 + 300) + (30 - 50 + 80) + (4 + 9) = 100 + 60 + 13 = 173
7 .
789 + 567 - 968 = ?
388
389
390
387
789 + 567 - 968 = (700 + 500 - 900) + (80 + 60 - 60) + (9 + 7 - 8) = 300 + 80 + 8 = 388
8 .
500 + 200 + 400 - 678 = ?
420
421
422
423
500 + 200 + 400 - 678 = (500 + 200 + 400 - 600) - (70) - (8) = 500 - 78 = 422. You can repeat the procedure if you are having difficulty in doing it in your head. Note: with negative numbers, the negative sign is kept with each part of the number, e.g. - 678 is written as -600, -70, -8
9 .
245 + 309 - 68 = ?
486
485
487
488
245 + 309 - 68 = (200 + 300) + (40 - 60) + (5 + 9 - 8) = 500 - 20 + 6 = 486
10 .
400 + 323 - 23 = ?
703
697
700
723
400 + 323 - 23 = (400 + 300) + (20 - 20) + (3 - 3) = 700. Be on the LOOKOUT FOR SHORT CUTS: 323 - 23 = 300
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