Here are some calculations for you.
Can you figure out the answers in your head?
No calculator allowed.
6 x 80  400 x 20  90 x 3000 
4 x 0.1  0.5 x 0.4  0.9 x 0.06 
18 ÷ 20  4 ÷ 0.4  49 ÷ 0.07 
Topics: Starter  Mental Methods  Place Value
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Previous Day  This starter is for 11 October  Next Day
6 x 80 = 480  400 x 20 = 8000  90 x 3000 = 270000 
4 x 0.1 = 0.4  0.5 x 0.4 = 0.2  0.9 x 0.06 = 0.054 
18 ÷ 20 = 0.9  4 ÷ 0.4 = 10  49 ÷ 0.07 = 700 
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