Here are some calculations for you.
Can you figure out the answers in your head?
No calculator allowed.
1 x 20  900 x 40  90 x 7000 
7 x 0.5  0.2 x 0.1  0.1 x 0.06 
18 ÷ 20  6 ÷ 0.6  14 ÷ 0.02 
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Topics: Starter  Mental Methods  Place Value
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Previous Day  This starter is for 11 October  Next Day
1 x 20 = 20  900 x 40 = 36000  90 x 7000 = 630000 
7 x 0.5 = 3.5  0.2 x 0.1 = 0.02  0.1 x 0.06 = 0.006 
18 ÷ 20 = 0.9  6 ÷ 0.6 = 10  14 ÷ 0.02 = 700 
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