Remember hundreds, tens and units!

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Presentation transcript:

Remember hundreds, tens and units! Today we are going to learn to add 2 and 3 digit numbers using partitioning. Remember hundreds, tens and units!

What strategies would you use to add 2 two-digit numbers quickly? This is one way to do it. Split the tens. Split the units. Count on.

72+15= Split the tens. Split the units. 70 + 10= 80 80+2=82 82+5= 87

43+56= Split the tens. Split the units. 40 + 50= 90 90+3=93 93+6= 99

143+234= Split the hundreds. Split the tens. Split the units. 100 + 200= 300 300+40=340 340+30=370 370+3=373 373+4= 377

Work out the answers before the questions disappear! 21+63= 45+51= 96 84 231+642= 873 How well did you get on?