Unit 3 – Addition and subtraction
Subtraction with pairs of 2-digit and 3-digit numbers
Let’s subtract 43 from 74.
Let’s subtract 40 from 74.
2
1
–10 –10 –10
–1 –1 –1 –10
–10
–10 –10 –10
74
74
31 32 33 34
44 54 64
34
44 54 64
−
=
−
−
−
=
=
Let’s find 286 − 32.
Let’s subtract 43 from 174
4
3
–3 –10 –10 –10 –10
131 134
144 154 164 174
−
=
−
−
=
−
2
8
6
=
286 − 32 = 200 − 0 = 200 80 − 30 = 50 6 − 2 = 4 200 + 50 + 4 = 254
43
9781380050687__text.indb 43
03/05/2022 10:18
Made with FlippingBook Learn more on our blog