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Addition with Regrouping Blocks

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Addition with Regrouping Blocks

A market stall is packing fruit into boxes of 10. Use tens and ones to solve each addition. When the ones make 10 or more, exchange 10 ones for 1 ten. Show your working in the answer space.

Part A: Pack the fruit

Solve each market order. Record the total and how many tens you have after exchanging ones.

1.The stall has 28 apples and receives 15 more. How many apples are there altogether? Show the exchange of 10 ones for 1 ten.

2.There are 39 pears in one crate and 27 in another. How many pears are there altogether? Write the ones addition and the total.

3.A basket has 46 feijoas. Another basket has 18. How many feijoas are there altogether?

4.The stall sells 37 carrots in the morning and 25 in the afternoon. How many carrots were sold? Explain what you regrouped.

Part B: Choose, check and explain

Use what you know about tens and ones to solve these stall puzzles.

5.Which order needs an exchange of 10 ones for 1 ten?

32 + 15
41 + 26
24 + 19
53 + 14

6.True or false: When adding 36 + 27, you exchange 10 ones for 1 ten.

TrueFalse

7.Fill in the missing digit: 4□ + 18 = 62. What digit belongs in the box? Show how you worked it out.

8.Maia says, “For 28 + 15, I get 313 because 8 + 5 = 13 and 2 + 1 = 3.” What mistake has Maia made? Write the correct total.

9.Make your own two-digit addition order that needs an exchange of 10 ones for 1 ten. Write the number sentence, solve it and say how you know it needs an exchange.