Unit 1 – Numbers and patterns
3 Look at the counting that the children are describing.
Both children stop counting when they reach 1000. Use these words to write about any patterns they should notice.
E
Letisha uses 100 g and 50 g weights to help find the mass of an object. Letisha first puts an odd number of 100 g weights on the balancing scales. Then she counts on in steps of 50 g to find the mass of the object. What could the mass of the object be if she uses 12 weights in total? Find all possibilities. Think about how you will communicate your solutions to others.
Rounding numbers to the nearest 10 and 100
Sort these numbers. 95 103 61 42 236 263 354 348 19
Round up to the nearest 10
Round down to the nearest 10
What do you notice about numbers that round up to the nearest 10? What do you notice about numbers that round down to the nearest 10?
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