CBSE Mental Maths Class 4 Worksheet - Takshila Learning Questions & Practice Worksheet Mental Maths for Class 4 1. Work out 0.8 + 0.6 =…….. 2. Write the Roman numerals XXVII figures? …… 3. Which of these fractions is equivalent to one-third? ½, ¾, 6/18, 14/28. …………… 4. Write down the number fourteen thousand seven hundred sixty? ……………. 5. Fill in the missing number = 4683 = 4010+ …………. 6.