››Mental Maths and Estimation
Grade 5 · Math
Mental Maths and Estimation
3 activities · Fill in! · Sort it!
Rounding, estimation, mental calculation shortcuts, checking reasonableness
SheetBerry · Printable Worksheets
Tips & Praises: ____________________________Tr. Sign.: ____________________Date: _______ Month: _______ Year: _______
1
Use mental maths shortcuts to find the answers!
99 × 10 = (100 × 10 - 10)
50 × 12 = (50 × 10 + 50 × 2)
2
Round each number as directed!
450 rounded to the nearest 100 =
1,987 rounded to nearest 1,000 =
267 rounded to nearest 10 =
3,456 rounded to nearest 100 =
348 rounded to the nearest 100 =
3
Round each number to the nearest 10 — sort them!
165 → rounds to 70
224 → rounds to 20
376 → rounds to 80
431 → rounds to 30
552 → rounds to 50
643 → rounds to 40
797 → rounds to 100
885 → rounds to 90
Rounds DOWN (stays at lower ten)
write sentence numbers here
Rounds UP (goes to higher ten)
write sentence numbers here
Colour a star for each activity you finish!
Ask a parent or teacher to check your work!
Teacher's comment
Signed: _______________
