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:
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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
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345 + 450 - 200 = (300 + 400 - 200) + (40 + 50) + (5) = 500 + 90 + 5 = 595
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245 + 309 - 68 = (200 + 300) + (40 - 60) + (5 + 9 - 8) = 500 - 20 + 6 = 486
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234 - 450 + 389 = (200 - 400 + 300) + (30 - 50 + 80) + (4 + 9) = 100 + 60 + 13 = 173
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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
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238 - 78 - 45 + 167 = (200 + 100) + (30 - 70 - 40 + 60) + (8 - 8 - 5 + 7) = 300 - 20 + 2 = 282
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400 - 389 - 400 + 567 = (500 - 300) + (60 - 80) + (7 - 9) = 200 - 20 - 2 = 178
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789 + 567 - 968 = (700 + 500 - 900) + (80 + 60 - 60) + (9 + 7 - 8) = 300 + 80 + 8 = 388
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234 - 68 + 2 + 13 = (200) + (30 - 60 + 10) + (4 + 2 + 3 - 8) = 200 - 20 + 1 = 181
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400 + 323 - 23 = (400 + 300) + (20 - 20) + (3 - 3) = 700. Be on the LOOKOUT FOR SHORT CUTS: 323 - 23 = 300
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