Playing with Number Patterns

Here are some numbers arranged in some patterns. Find out the sum of the numbers in each of the below figures.

Should we add them one by one or can we use a quicker way?

Share and discuss in class the different methods each one of you used to solve these questions.

Count Numbers 40's : 40 × 4 =

160 × (rows) =

50's : 50 × 5 =

250 × (rows) =

squares with 1 dot.

squares with 5 dots.

So Sum = 44 × 1 + 20 × 5 =

32's : 32 × =

256 × (rows) =

64's : 64 × =

256 × =

1024 + 1024 =

dots × 7 squares =

dots × 6 squares =

dots × 12 squares =

dots × 3 squares =

21 + 24 + 48 + 9 =

35's,25's,15's: center : ,,

Middle Ring : ,,

Outer Layer: , ,

Total 35's,25's,15's = 2+12+8 =

22 × 35 = , 22 × 25 = , 22 × 15 =

770 + 550 + 330 =

125 × (outer circle) =

250 × (2nd circle) =

500 × (3rd circle) =

1000 × (4th circle) =

2250 + 2250 + 2000 + 1000 =

Chapter 3: Number Play