What is 49 + 25? (Trick: round 49 to 50, subtract 1 later) - 74, What is 35 × 2? (Trick: double 35 in your head) - 70, What is 101 − 48? (Trick: use 100 − 48 and adjust) - 53, What is 19 + 36? (Trick: make 19 into 20 and subtract 1 later) - 55, What is 75 ÷ 5? (Trick: think how many 5s in 50 and in 25) - 15, What is 24 × 5? (Trick: halve 24, then multiply by 10) - 120, What is 102 − 97? (Trick: count up from 97 to 102) - 5, What is 99 + 36? (Trick: do 100 + 36 then subtract 1) - 135, What is 12 × 11? (Trick: do 12 × 10 and add 12) - 132, What is 14 × 6? (Trick: double 14, then multiply that by 3) - 84, What is 45 + 29? (Trick: round 29 to 30 and adjust) - 74, What is 81 ÷ 3? (Trick: use known 3x tables fact) - 27, What is 25 × 16? (Trick: multiply by 100 and divide by 4) - 400, What is 17 × 9? (Trick: do 17 × 10 and subtract 17) - 153, What is 38 + 47? (Trick: round 38 to 40 and adjust after) - 85, What is 60% of 90? (Trick: 10% of 90 = 9, then ×6) - 54, What is 0.5 × 140? (Trick: half of 140) - 70, What is 33 × 3? (Trick: 30 × 3 + 3 × 3) - 99, What is 28 × 25? (Trick: find a quarter of 100 × 28) - 700, What is 12 × 12? (Trick: know your square numbers) - 144,

Mental maths tricks

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