Adding and Subtracting 100s, 10s and 1s
-We are learning to solve subtraction problems by subtracting 100s, 10s and 1s.
-We are learning to solve addition problems by adding 100s, 10s and 1s
Question
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Working
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Answer
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475 +158=
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E.g.
400 + 100 = 500
70 + 50 = 120
5 + 8 = 13
500 + 120 = 13 = 633
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633
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199+188=234
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100 + 100 = 200
90 + 80 = 170
9 + 8 17
199 + 188 234
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234
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634+197=831
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600 + 100 = 700
30 + 90 = 120
4 + 7 = 11
634 + 197 =831
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831
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188+189=377
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100 + 100 = 200
80 + 80 = 160
8 + 9 = 17
188 + 189 = 377
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377
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299+156=455
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200 + 100 + 300
90 + 50 =140
9 + 6 =15
299 + 156 = 455
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455
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Question
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Working
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Answer
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482-394=88
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400 - 300 = 100
80 - 90 = 10
2 - 4 = 2
482 - 394 = 88
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88
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531-198=33
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500 - 100 = 400
30 - 90 =60
1 - 8 = 7
531 - 198 = 333
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333
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535-379=
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500 - 300 = 200
30 - 70 = 40
5 - 9 = 4
535 - 379 =244
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933-399=534
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900 - 300 = 600
30 - 90 = 60
3 - 9 = 6
933 - 399 = 534
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534
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221-177=44
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200 - 100 - 100
20 - 70 = 50
7 - 1 =6
221 - 177 = 44
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44
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Word problems
Problem
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Working and answer
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Miss Davis had $833 she spent $245 at the supermarket. How much money does Miss Davis have left?
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$833 - $245 = 588
800 - 200 = 600
30 - 40 = 10
3 - 5 = 2
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The bakery made 174 cookies in the morning and they made another 289 cookies in the afternoon. How many cookies did they made that day?
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174 + 289 = 463 cookies
100 + 200 = 300
70 + 80 = 170
4 + 9 = 13
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There are 374 children at the park. 198 children leave. How many children are left at the park?
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374 - 198 =176
300 - 100 = 200
70 - 90 = 20
4 - 8 = 4
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