Here are some calculations for you.
Can you figure out the answers in your head?
No calculator allowed.
6 x 90  900 x 90  60 x 3000 
6 x 0.3  0.1 x 0.9  0.1 x 0.04 
28 ÷ 40  21 ÷ 0.7  9 ÷ 0.09 
Topics: Starter  Mental Methods  Place Value
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Previous Day  This starter is for 11 October  Next Day
6 x 90 = 540  900 x 90 = 81000  60 x 3000 = 180000 
6 x 0.3 = 1.8  0.1 x 0.9 = 0.09  0.1 x 0.04 = 0.004 
28 ÷ 40 = 0.7  21 ÷ 0.7 = 30  9 ÷ 0.09 = 100 
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