Partition numbers of any size in non-standard forms to aid mental calculation, eg when adding 163 480 and 150 000, 163 480 could be partitioned as 150 000 + 13 480, so that 150 000 could then be doubled and added to 13 480
| 1. | Fill the Gaps: 1000s, 100s, 10s, 1s, 10ths | |
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