Here are some calculations for you.
Can you figure out the answers in your head?
No calculator allowed.
4 x 70  700 x 30  40 x 1000 
1 x 0.9  0.3 x 0.7  0.9 x 0.02 
21 ÷ 30  16 ÷ 0.4  35 ÷ 0.05 
Topics: Starter  Mental Methods  Place Value
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Previous Day  This starter is for 11 October  Next Day
4 x 70 = 280  700 x 30 = 21000  40 x 1000 = 40000 
1 x 0.9 = 0.9  0.3 x 0.7 = 0.21  0.9 x 0.02 = 0.018 
21 ÷ 30 = 0.7  16 ÷ 0.4 = 40  35 ÷ 0.05 = 700 
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