Mental Maths Questions Worksheet for Class 5
How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.
NameDateTime takenScore ___ / 40
- 1.29 + 2 =
- 2.15 + 16 =
- 3.Best estimate of 77 × 92? (a) 7200 (b) 72000 (c) 720
- 4.Half of 118 =
- 5.You start your homework at 6:50 and finish at 7:15. How many minutes did you work?
- 6.67 + 7 =
- 7.517 − 475 =
- 8.Best estimate of 46 × 83? (a) 40000 (b) 4000 (c) 400
- 9.87 laddoos are packed in boxes of 8. How many laddoos are left over?
- 10.84 − 69 =
- 11.96 ÷ 4 =
- 12.29 + 4 =
- 13.24 × 6 =
- 14.81 − 56 =
- 15.A train leaves at 7:40 and reaches the next city at 9:50. How many minutes is the journey?
- 16.801 ÷ 9 =
- 17.88 + 31 =
- 18.49 − 19 =
- 19.33 laddoos are packed in boxes of 7. How many laddoos are left over?
- 20.Double 57 =
- 21.264 ÷ 8 =
- 22.35 + 61 =
- 23.10% of ₹80 =
- 24.116 − 89 =
- 25.25 + 26 =
- 26.61 + 51 =
- 27.104 − 29 =
- 28.3 + ? = 10
- 29.75 + ? = 100
- 30.519 − 494 =
- 31.Best estimate of 433 + 200? (a) 800 (b) 600 (c) 400
- 32.85 + 8 =
- 33.66 + ? = 100
- 34.A cricket match starts at 2:50 and the first innings ends at 4:20. How many minutes did the innings last?
- 35.526 − 480 =
- 36.204 − 195 =
- 37.28 × 5 =
- 38.Best estimate of 21 × 36? (a) 80 (b) 800 (c) 8000
- 39.80 ÷ 4 =
- 40.You buy a notebook for ₹38 and pay with a ₹100 note. How much change do you get, in rupees?
Answer key
- 31
- 31
- 7200
- 59
- 25
- 74
- 42
- 4000
- 7
- 15
- 24
- 33
- 144
- 25
- 130
- 89
- 119
- 30
- 5
- 114
- 33
- 96
- 8
- 27
- 51
- 112
- 75
- 7
- 25
- 25
- 600
- 93
- 34
- 90
- 46
- 9
- 140
- 800
- 20
- 62
Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths