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.Double 31 =
- 2.38 + 9 =
- 3.29 + 30 =
- 4.120 ÷ 8 =
- 5.Double 81 =
- 6.You buy a box of crayons for ₹36 and pay with a ₹100 note. How much change do you get, in rupees?
- 7.What is the remainder when 53 is divided by 4?
- 8.78 + 9 =
- 9.85 − 77 =
- 10.78 + 3 =
- 11.Best estimate of 18 × 67? (a) 140 (b) 14000 (c) 1400
- 12.Half of 118 =
- 13.21 + 23 =
- 14.72 ÷ 4 =
- 15.15 × 8 =
- 16.232 ÷ 8 =
- 17.8 + 7 =
- 18.Best estimate of 272 + 343? (a) 600 (b) 400 (c) 800
- 19.53 + ? = 100
- 20.16 + 17 =
- 21.56 + ? = 100
- 22.62 + 61 =
- 23.1029 − 991 =
- 24.390 − 99 =
- 25.25 + ? = 100
- 26.28 + 29 =
- 27.You buy a bag of mangoes for ₹436 and pay with a ₹500 note. How much change do you get, in rupees?
- 28.67 − 52 =
- 29.63 − 47 =
- 30.59 + 9 =
- 31.93 ÷ 3 =
- 32.64 + 25 =
- 33.508 − 494 =
- 34.Best estimate of 39 × 42? (a) 16000 (b) 160 (c) 1600
- 35.25 children stand in rows of 3. How many full rows can they make?
- 36.89 + 21 =
- 37.240 ÷ 4 =
- 38.17 children stand in rows of 3. How many full rows can they make?
- 39.75 × 4 =
- 40.28 × 8 =
Answer key
- 62
- 47
- 59
- 15
- 162
- 64
- 1
- 87
- 8
- 81
- 1400
- 59
- 44
- 18
- 120
- 29
- 15
- 600
- 47
- 33
- 44
- 123
- 38
- 291
- 75
- 57
- 64
- 15
- 16
- 68
- 31
- 89
- 14
- 1600
- 8
- 110
- 60
- 5
- 300
- 224
Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths