I am learning to solve addition and subtraction at level 3
1.
There are 21 people at a beach, and 13 more people arrive.Show how to work out how many people are at the beach altogether?
20+10=30 ,1+3=4 so 30+4=34
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2
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Two classes go on camp together. One class has 47 students and the other has 38.Show how to work out how many students go on camp?
40+30=70, take 2 away from the 7 and add it to the 8 which makes another 10 so 10+5=15 so 70+10+5=85
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3. A farmer has 63 cows. He buys 39 more cows.
Show how to work out how many cows he has altogether.
60+30=90, 9+3=12 so 90+10+2=102
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