Page 123 - New Medley 3 Semester 1

D. Population of a village is 5412. Population of another village is 2489.
Estimate the total population of the two villages by rounding to nearest
hundreds.

E. Estimate the sum by rounding to nearest thousands.

1. 4819 + 3139 2. 1312 + 6949

Estimate: + Estimate: +

= =
3. 4329 + 2909 4. 5149 + 1902

Estimate: + Estimate: +

= =

F. A factory made 1023 items in the first week, 2342 items in the second week
and 3145 items in the third week. Estimate the number of items made in
the three weeks by rounding to nearest thousands.

PUZZLE • Critical Thinking

Place the numbers 1 to 9 in the 3 by 3 grid so that each horizontal and vertical
lines adds up to the given sum.

You can use each number only once. Some numbers are already placed.

4 10 12

3 17 5 15

18 18

17 17 11 7 15 23

MATHS LAB ACTIVITY • Experiential Learning

Aim: To practise addition of 4-digit numbers

Materials: A sheet of paper, a pencil and a spinner

Note: To be played between two teams (4 players in each team).

121