Addition and subtraction · Ages 6–7
Two-digit addition and subtraction worksheet
Covers: Two-digit addition without carrying, Adding and subtracting tens, Two-digit addition with carrying, Adding three numbers, Two-digit subtraction without borrowing, Two-digit subtraction with borrowing, Column addition and subtraction
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Two-digit addition and subtraction worksheet
Addition and subtraction · Ages 6–7
Numsprite
numsprite.com
Name:Date:Score:／48
Write each answer in the space. For word problems, show your working and write a sentence answer.
Part A: Working out and filling in (2 marks each)
1.21 + 4 =
Answer:
2.13 + 25 =
Answer:
3.17 − 10
Answer:
4.83 + 10
Answer:
5.71 + 29
Answer:
6.51 + 19
Answer:
7.4 + 5 + 4 =
Answer:
8.47 − = 31
Answer:
9.86 − 12
Answer:
10.What digit is the ? in the sum in column form?
Answer:
Part B: Choose, or true or false (2 marks each)
11.3 + 8 + 3 = 13
True or false?
Answer:
12.Checking by adding shows that 75 − 40 = 34 is right.
True or false?
Answer:
Part C: Word problems (4 marks each)
13.A bus has 71 passengers. At a stop 5 more get on and nobody gets off. How many passengers are on the bus now?
Working:
Answer:
14.A bakery sold 22 cocktail buns in the morning and 39 in the afternoon. How many cocktail buns did it sell that day?
Working:
Answer:
15.Ka-yee buys a $35 pen, a $27 notebook and a $5 eraser. How much is that altogether?
Working:
Answer:
16.May wants to fold 57 paper cranes and has folded 46. How many more must May fold?
Working:
Answer:
17.Tsz-ching has $50 and buys a football for $25. How many dollars does she have left?
Working:
Answer:
18.An orchard picks 48 oranges on the first day and 28 on the second. Working in column form, how many oranges is that in the two days?
Working:
Answer:
Show the answers and working
Two-digit addition and subtraction worksheet: Answers and working
Part A: Working out and filling in
1. 25
Adding a one-digit number only changes the ones. Work out 1 + 4; leave the tens alone.
Adding a one-digit number changes only the ones: 1 + 4 = 5, the tens stay 2, so 25.
2. 38
Tens with tens, ones with ones. Start with the tens digits: 1 and 2.
Tens with tens: 1 + 2; ones with ones: 3 + 5. The answer is 38.
3. 17 − 10 = 7
The ones (7) stay put; just the tens: 1 − 1 = 0 → 7
4. 83 + 10 = 93
The ones (3) stay put; just the tens: 8 + 1 = 9 → 93
5. 71 + 29 = 100
Left to right, add the tens first: 71 + 20 = 91, then the ones: 91 + 9 = 100
6. 51 + 19 = 70
Left to right, add the tens first: 51 + 10 = 61, then the ones: 61 + 9 = 70
7. 13
See whether two of them make 10. If not, go left to right: start with 4 + 5.
Left to right: 4 + 5 = 9, 9 + 4 = 13.
8. 16
Compare 47 with 31: how many fewer tens are there, and how many fewer ones?
What taken from 47 leaves 31? 47 − 31 = 16; check: 31 + 16 = 47.
9. 86 − 12 = 74
Left to right, subtract the tens first: 86 − 10 = 76, then the ones: 76 − 2 = 74
10. 9
Look at the ones column first: ? plus the digit below it must end like the answer does.
Look at the ones: ? + 3 must end like the answer, so ? is 9; check with 29 + 23 = 52.
Part B: Choose, or true or false
11. False
Look for two that make 10, work out the total, then compare it with 13.
3 + 8 + 3 = 14: find two that make 10 first, or go left to right.
12. False
Check by adding: put 34 and 40 together and see whether you get 75.
Check: 35 + 40 = 75, so 75 − 40 = 35.
Part C: Word problems
Marking: 2 for the working, 1 for the answer, 1 for the sentence.
13. 76 passengers
More people get on, so add. Adding a one-digit number only changes the ones.
Getting on means more, so add: 71 + 5 = 76; only the ones change.
14. A bakery sold 22 cocktail buns in the morning and 39 in the afternoon. How many cocktail buns did it sell that day? (Answer: 61 cocktail buns)
22 + 39 = 61
15. 67 dollars
See which two prices have ones that make 10. Add 35 and 5 first to get a whole ten.
Add the pair that makes a whole ten first: 35 + 5 = 40; then 27: $67.
16. 11 cranes
The 46 folded and the ones still to fold make 57. So take 46 away from 57.
The ones still to fold + 46 = 57, so it is 57 − 46 = 11.
17. Tsz-ching has $50 and buys a football for $25. How many dollars does she have left? (Answer: 25 dollars)
50 − 25 = 25
18. 76 oranges
Set 48 and 28 out in column form and start with the ones. They go past 9, so carry 1 to the tens.
The ones make 10 or more, so carry 1: 48 + 28 = 76.
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