Question #124733

Give the learner's written work to do. Give them about 20 exercises ith the operation sign missing. They must fill in the correct operation sign. Examples: - 480 16=(answer÷)

- 540 9=4 5

- 60 12=72

Concept development (25 minutes)

. Give each group of learners some match sticks. Ask them to build a row of three triangles such as this:(draw this on the board.)

- ask the learners if we can conclude that we need 2 matches to build every triangle. We can, but to close the last ( of first) triangle, we need an extra match:

- if we need to make a pattern of 100 triangles, it is not practical to sit and make all those triangles, so we need to establish a rule.ask the learner's if they can think of a rule. It is (number of triangles ×2)+1.so to make a pattern of 100 triangles, we work out how many matches we need like this:(100×2)+1=201.

- 540 9=4 5

- 60 12=72

Concept development (25 minutes)

. Give each group of learners some match sticks. Ask them to build a row of three triangles such as this:(draw this on the board.)

- ask the learners if we can conclude that we need 2 matches to build every triangle. We can, but to close the last ( of first) triangle, we need an extra match:

- if we need to make a pattern of 100 triangles, it is not practical to sit and make all those triangles, so we need to establish a rule.ask the learner's if they can think of a rule. It is (number of triangles ×2)+1.so to make a pattern of 100 triangles, we work out how many matches we need like this:(100×2)+1=201.

Expert's answer

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