1) 1kg +? a) 100000000000000000000 b) 1000 c) 1000000000000 d) 2000 e) 20000000000000000 f) 100000000000000000000000000000 2) 3kg + 4kg a) 11 b) 7 c) 8 d) 7kg e) 8kg f) 9kg 3) which is heavier   a) ball b) rock 4) which is heavier a) house b) tree c) ball 5) which is heavier a) fan b) house 6) which is heavier a) car b) tree

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