Unit 15 – The four operations
Dividing 2-digit numbers
Use blocks or counters to explore Carl’s idea. Do you agree? What connections do you notice between these divisions?
1 The arrays represent two division calculations. What is the same and what is different about them?
18 ÷ 3 = 6
19 ÷ 3 = 6 r 1
When 19 is divided by 3 there is a left-over. We call this a remainder.
2 We can use multiplication facts to help solve divisions. We know that 10 × 5 = 50 75 is 25 more than 50. We know that 5 × 5 = 25 So there are 15 groups of 5 in 75. Check the answer on a calculator. Explain the steps you take.
197
9781380050687__text.indb 197
03/05/2022 10:20
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