Subtraction with 2-digit and 3-digit numbers
1 We can complete the subtraction 174 − 43 in different ways.
−40
Subtracting place value parts 174 − 43 =
−3
100 − 0 = 100 70 − 40 = 30 4 − 3 = 1 100 + 30 + 1 = 131
131
134
174
Subtracting back 174 − 43 = 174 − 40 − 3 = 134 − 3 = 131
What is the same and what is different about the methods?
2 What is different about the subtraction 174 − 47? Look at what happens when we try to subtract 7 ones.
1
7
4
1
6
14
We can complete the subtraction as: 174 − 47 = 100 − 0 = 100 60 − 40 = 20 14 − 7 = 7 100 + 20 + 7 = 127
126
9781380050687__text.indb 126
03/05/2022 10:19
Made with FlippingBook Learn more on our blog