Practising Mental Math improves concentration span, sharpens memory, improves number sense and reduces calculation errors. HAPPY PRACTISING!
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19 less than 100 is
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12 + 3 tens =
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3 subtracted from 3 tens is
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What number comes before 202?
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5 tens + 15 =
981 is smaller than 918.
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88 + 22 =
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9 more than 209 is
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10 added to 18 ones is
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109 – 10 =
