Unit 9 – The four operations
2 Look at the column method of subtraction for 348 − 192.
We start by subtracting the ones:
H T O 3 4 8 + 1 9 2 1 5 6 2 1
8 ones − 2 ones = 6 ones 14 tens − 9 tens = 5 tens 2 hundreds − 1 hundred = 1 hundred
(a) Estimate the answer to 758 − 383. 758 rounds to
1
to the nearest 100.
to the nearest 100.
383 rounds to
− = (b) Complete the calculation using the two different methods. 758 − 383 = − = − = − = + H T O 7 5 8 − 3 8 3
Which method did you prefer for this calculation? Why?
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04/05/2022 15:50
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